WE – L

All pages en.m.wikipedia.org Display pages starting at: L



A language is a structured system of communication used by humans consisting of speech (spoken language) and gestures (sign language). Most languages have a visual or graphical representation encoded into symbols, or a writing system composed of glyphs to inscribe the original sound or gesture and its meaning.

View more – Wikipedia.org:



Lapidary (from the Latin lapidarius) is the practice of shaping stone, minerals, or gemstones into decorative items such as cabochons, engraved gems (including cameos), and faceted designs. A person who practices lapidary is known as a lapidarist. A lapidarist uses the lapidary techniques of cutting, grinding, and polishing. Hardstone carving requires specialized carving techniques.



Laughter is a physical reaction in humans consisting usually of rhythmical, often audible contractions of the diaphragm and other parts of the respiratory system. It is a response to certain external or internal stimuli. Laughter can arise from such activities as being tickled, or from humorous stories or thoughts. Most commonly, it is considered a visual expression of a number of positive emotional states, such as joy, mirth, happiness, relief, etc. On some occasions, however, it may be caused by contrary emotional states such as embarrassment, apology, or confusion such as nervous laughter or courtesy laugh.



Law is a system of rules created and enforced through social or governmental institutions to regulate behavior, with its precise definition a matter of longstanding debate. It has been variously described as a science and the art of justice. State-enforced laws can be made by a group legislature or by a single legislator, resulting in statutes; by the executive through decrees and regulations; or established by judges through precedent, usually in common law jurisdictions. Private individuals may create legally binding contracts, including arbitration agreements that adopt alternative ways of resolving disputes to standard court litigation. The creation of laws themselves may be influenced by a constitution, written or tacit, and the rights encoded therein. The law shapes politics, economics, history and society in various ways and serves as a mediator of relations between people.



A lawyer or attorney is a person who practices law, as an advocate, attorney at law, barrister, barrister-at-law, bar-at-law, canonist, canon lawyer, civil law notary, counsel, counselor, solicitor, legal executive, or public servant preparing, interpreting and applying the law, but not as a paralegal or charter executive secretary. Working as a lawyer involves the practical application of abstract legal theories and knowledge to solve specific individualized problems, or to advance the interests of those who hire lawyers to perform legal services. The role of the lawyer varies greatly across different legal jurisdictions.



Leadership is both a research area, and a practical skill encompassing the ability of an individual, group or organization to “lead”, influence or guide other individuals, teams, or entire organizations. Often viewed as a contested term, specialist literature debates various viewpoints, contrasting Eastern and Western approaches to leadership, and also (within the West) North American versus European approaches.

U.S. academic environments define leadership as “a process of social influence in which a person can enlist the aid and support of others in the accomplishment of a common task”. Others have challenged the more traditional managerial view of leadership which believes that it is something possessed or owned by one individual due to their role or authority, and instead advocate the complex nature of leadership which is found at all levels of the institution, both within formal roles.

Studies of leadership have produced theories involving traits, situational interaction, function, behavior, power, vision and values, charisma, and intelligence, among others.



Learning is the process of acquiring new, or modifying existing, knowledge, behaviors, skills, values, or preferences. The ability to learn is possessed by humans, animals, and some machines; there is also evidence for some kind of learning in certain plants. Some learning is immediate, induced by a single event (e.g. being burned by a hot stove), but much skill and knowledge accumulates from repeated experiences. The changes induced by learning often last a lifetime, and it is hard to distinguish learned material that seems to be “lost” from that which cannot be retrieved.


Learning space

Learning space or learning setting refers to a physical setting for a learning environment, a place in which teaching and learning occur. The term is commonly used as a more definitive alternative to “classroom,” but it may also refer to an indoor or outdoor location, either actual or virtual. Learning spaces are highly diverse in use, learning styles, configuration, location, and educational institution. They support a variety of pedagogies, including quiet study, passive or active learning, kinesthetic or physical learning, vocational learning, experiential learning, and others.



A lecture (from the French lecture, meaning reading) is an oral presentation intended to present information or teach people about a particular subject, for example by a university or college teacher. Lectures are used to convey critical information, history, background, theories, and equations. A politician’s speech, a minister’s sermon, or even a business person’s sales presentation may be similar in form to a lecture. Usually the lecturer will stand at the front of the room and recite information relevant to the lecture’s content.


Legal guardian

A legal guardian is a person who has been appointed by a court or otherwise has the legal authority (and the corresponding duty) to care for the personal and property interests of another person, called a ward. Guardians are typically used in four situations: guardianship for an incapacitated senior (due to old age or infirmity), guardianship for a minor, and guardianship for developmentally disabled adults and for adults found to be incompetent. A parent of a child is normally not considered a guardian, though the responsibilities may be similar. A family member is most commonly appointed guardian, though a professional guardian or public trustee may be appointed if a suitable family member is not available.


Legal name

A legal name is the name that identifies a person for legal, administrative and other official purposes. A person’s first legal name generally is the name of the person that was given for the purpose of registration of the birth and which then appears on a birth certificate (see birth name), but may change subsequently. Most jurisdictions require the use of a legal name for all legal and administrative purposes, and some jurisdictions permit or require a name change to be recorded at marriage. The legal name may need to be used on various government issued documents (e.g., a court order). The term is also used when an individual changes their first or full name, typically after reaching a certain legal age (usually eighteen or over, though it can be as low as fourteen in several European nations).

A person’s legal name typically is the same as their personal name, comprising a given name and a family name. The order varies according to culture and country. There are also country-by-country differences on changes of legal names by marriage. (See married name.)


Legal person

In law, a legal person is any person or ‘thing’ (less ambiguously, any legal entity) that can do the things a human person is usually able to do in law – such as enter into contracts, sue and be sued, own property, and so on. The reason for the term “legal person” is that some legal persons are not people: companies and corporations are “persons” legally speaking (they can legally do most of the things an ordinary person can do), but they are clearly not people in the ordinary sense.

There are therefore two kinds of legal entities: human and non-human. In law, a human person is called a natural person (sometimes also a physical person), and a non-human person is called a juridical person (sometimes also a juridic, juristic, artificial, legal, or fictitious person, Latin: persona ficta).



Leisure has often been defined as a quality of experience or as free time. Free time is time spent away from business, work, job hunting, domestic chores, and education, as well as necessary activities such as eating and sleeping. Situationist International proposes that leisure does not evolve from free time, and free-time is an illusory concept that is rarely fully “free”; economic and social forces appropriate free time from the individual and sell it back to them as the commodity known as “leisure”. Certainly most people’s leisure activities are not a completely free choice and may be constrained by social pressures, e.g. people may be coerced into spending time gardening by the need to keep up with the standard of neighbouring gardens or go to a party because of social pressures.


Level of analysis

The term “level of analysis” is used in the social sciences to point to the location, size, or scale of a research target.

“Level of analysis” is distinct from the term “unit of observation” in that the former refers to a more or less integrated set of relationships while the latter refers to the distinct unit from which data have been or will be gathered. Together, the unit of observation and the level of analysis help define the population of a research enterprise.

View more – Wikipedia.org:



Broadly speaking, liberty is the ability to do as one pleases. In modern politics, liberty is the state of being free within society from oppressive restrictions imposed by authority on one’s way of life, behaviour, or political views. In philosophy, liberty involves free will as contrasted with determinism. In theology, liberty is freedom from the effects of “sin, spiritual servitude, [or] worldly ties”. Sometimes liberty is differentiated from freedom by using the word “freedom” primarily, if not exclusively, to mean the ability to do as one wills and what one has the power to do; and using the word “liberty” to mean the absence of arbitrary restraints, taking into account the rights of all involved. In this sense, the exercise of liberty is subject to capability and limited by the rights of others. Thus liberty entails the responsible use of freedom under the rule of law without depriving anyone else of their freedom.


Library science

Library science (often termed library studies, bibliothecography, library economy, and informatics) is an interdisciplinary or multidisciplinary field that applies the practices, perspectives, and tools of management, information technology, education, and other areas to libraries; the collection, organization, preservation, and dissemination of information resources; and the political economy of information. Martin Schrettinger, a Bavarian librarian, coined the discipline within his work (1808–1828) Versuch eines vollständigen Lehrbuchs der Bibliothek-Wissenschaft oder Anleitung zur vollkommenen Geschäftsführung eines Bibliothekars. Rather than classifying information based on nature-oriented elements, as was previously done in his Bavarian library, Schrettinger organized books in alphabetical order. The first American school for library science was founded by Melvil Dewey at Columbia University in 1887.


Licentiate (degree)

A licentiate (abbreviated Lic.) is a degree below that of a PhD given by universities in some countries. In others, for example almost all countries in the European Union, a licentiate is a 3 to 4 years degree, equivalent to a bachelor’s degree. The term is also used for a person who holds this degree. The term derives from Latin licentia, “freedom” (from Latin licere, “to allow”), which is applied in the phrases licentia docendi meaning permission to teach and licentia ad practicandum signifying someone who holds a certificate of competence to practise a profession. Many countries have degrees with this title, but they may represent different educational levels.



Life is a characteristic that distinguishes physical entities that have biological processes, such as signaling and self-sustaining processes, from those that do not, either because such functions have ceased (they have died), or because they never had such functions and are classified as inanimate. Various forms of life exist, such as plants, animals, fungi, protists, archaea, and bacteria. Biology is the science concerned with the study of life.



Life satisfaction

Life satisfaction (LS) is the way in which people show their emotions, feelings (moods) and how they feel about their directions and options for the future. It is a measure of well-being assessed in terms of mood, satisfaction with relationships, achieved goals, self-concepts, and self-perceived ability to cope with one’s daily life. Life satisfaction involves a favorable attitude towards one’s life rather than an assessment of current feelings. Life satisfaction has been measured in relation to economic standing, degree of education, experiences, residence, among many other topics. Life satisfaction is a key part of subjective wellbeing.


Lifestyle (sociology)

Lifestyle is the interests, opinions, behaviours, and behavioural orientations of an individual, group, or culture. The term was introduced by Austrian psychologist Alfred Adler in his 1929 book, The Case of Miss R., with the meaning of “a person’s basic character as established early in childhood”. The broader sense of lifestyle as a “way or style of living” has been documented since 1961. Lifestyle is a combination of determining intangible or tangible factors. Tangible factors relate specifically to demographic variables, i.e. an individual’s demographic profile, whereas intangible factors concern the psychological aspects of an individual such as personal values, preferences, and outlooks.

A rural environment has different lifestyles compared to an urban metropolis. Location is important even within an urban scope. The nature of the neighborhood in which a person resides affects the set of lifestyles available to that person due to differences between various neighborhoods’ degrees of affluence and proximity to natural and cultural environments. For example, in areas near the sea, a surf culture or lifestyle can often be present.

View more – Wikipedia.org:



Lifeworld (German: Lebenswelt) may be conceived as a universe of what is self-evident or given, a world that subjects may experience together. For Edmund Husserl, the lifeworld is the fundamental for all epistemological enquiries. The concept has its origin in biology and cultural Protestantism.

The lifeworld concept is used in philosophy and in some social sciences, particularly sociology and anthropology. The concept emphasizes a state of affairs in which the world is experienced, the world is lived (German erlebt). The lifeworld is a pre-epistemological stepping stone for phenomenological analysis in the Husserlian tradition.

View more – Wikipedia.org:



Limnology (/lɪmˈnɒlədʒi/ lim-NOL-ə-jee; from Greek λίμνη, limne, “lake” and λόγος, logos, “knowledge”) is the study of inland aquatic ecosystems. The study of limnology includes aspects of the biological, chemical, physical, and geological characteristics and functions of inland waters (running and standing waters, fresh and saline, natural and man-made). This includes the study of lakes, reservoirs, ponds, rivers, springs, streams, wetlands, and groundwater. A more recent sub-discipline of limnology, termed landscape limnology, studies, manages, and seeks to conserve these ecosystems using a landscape perspective, by explicitly examining connections between an aquatic ecosystem and its drainage basin. Recently, the need to understand global inland waters as part of the Earth System created a sub-discipline called global limnology. This approach considers processes in inland waters on a global scale, like the role of inland aquatic ecosystems in global biogeochemical cycles.

Limnology is closely related to aquatic ecology and hydrobiology, which study aquatic organisms and their interactions with the abiotic (non-living) environment. While limnology has substantial overlap with freshwater-focused disciplines (e.g., freshwater biology), it also includes the study of inland salt lakes.



Linguistics is the scientific study of language. It involves analysis of language form, language meaning, and language in context, as well as an analysis of the social, cultural, historical, and political factors that influence language.

Linguists traditionally analyse human language by observing the relationship between sound and meaning. Meaning can be studied in its directly spoken or written form through the field of semantics, as well as in its indirect form through body language and gestures under the discipline of pragmatics. Each speech sound particle is called a phoneme. How these phonemes are organised to convey meaning depends on various linguistic patterns and structures that theoretical linguists describe and analyse.

View more – Wikipedia.org:


List of Internet phenomena

Social and cultural phenomena specific to the Internet include Internet memes, such as popular themes, catchphrases, images, viral videos, and jokes. When such fads and sensations occur online, they tend to grow rapidly and become more widespread because the instant communication facilitates word of mouth transmission.

The below partial list focuses more on Internet phenomena that is not restricted by regional Internet laws; other countries such as China or Pakistan do have Internet phenomena specific there that is not blocked by regional laws. Other regional Internet phenomena in countries with restricted regional laws are covered in List of Internet phenomena in China and List of Internet phenomena in Pakistan.


List of life sciences

This list of life sciences comprises the branches of science that involve the scientific study of life and organisms – such as microorganisms, plants, and animals including human beings. This science is one of the two major branches of natural science, the other being physical science, which is concerned with non-living matter. Biology is the overall natural science that studies life and living organisms, with the other life sciences its sub-disciplines.

Some life sciences focus on a specific type of organism. For example, zoology is the study of animals, while botany is the study of plants. Other life sciences focus on aspects common to all or many life forms, such as anatomy and genetics. Some focus on the micro-scale (e.g. molecular biology, biochemistry) other on larger scales (e.g. cytology, immunology, ethology, pharmacy, ecology). Another major branch of life sciences involves understanding the mind – neuroscience. Life sciences discoveries are helpful in improving the quality and standard of life and have applications in health, agriculture, medicine, and the pharmaceutical and food science industries.


List of sovereign states and dependent territories by continent

This is a list of sovereign states and dependent territories of the world by continent, displayed with their respective national flags, including the following entities:

By association within the UN system:
The 193 United Nations member states (UN).
Vatican City (administered by the Holy See, a UN observer state), which has diplomatic relations with 183 countries as of 7 Jan 2019.
Palestine (a UN observer state), which has diplomatic relations with 138 countries as of 31 July 2019.

By Other States
Generally this contains states with limited recognition and associated states not members of the United Nations
Partially recognised de facto sovereign states without UN membership, such as the Republic of Kosovo and Taiwan (Republic of China)
De facto sovereign states lacking general international recognition
Cook Islands and Niue, two associated states of New Zealand without UN membership
By Dependent Territories of other UN member states:
Generally this contains non-sovereign territories that are recognized by the UN as part of some member state.
Dependent territories.
Special territories recognized by international treaty (such as the special administrative regions of China).
Other territories often regarded as separate geographical territories even though they are integral parts of their mother countries (such as the overseas departments of France).

View more – Wikipedia.org:


Literary criticism

Literary criticism (or literary studies) is the study, evaluation, and interpretation of literature. Modern literary criticism is often influenced by literary theory, which is the philosophical discussion of literature’s goals and methods. Though the two activities are closely related, literary critics are not always, and have not always been, theorists.

Whether or not literary criticism should be considered a separate field of inquiry from literary theory, or conversely from book reviewing, is a matter of some controversy. For example, the Johns Hopkins Guide to Literary Theory and Criticism draws no distinction between literary theory and literary criticism, and almost always uses the terms together to describe the same concept. Some critics consider literary criticism a practical application of literary theory, because criticism always deals directly with particular literary works, while theory may be more general or abstract.

Literary criticism is often published in essay or book form. Academic literary critics teach in literature departments and publish in academic journals, and more popular critics publish their reviews in broadly circulating periodicals such as The Times Literary Supplement, The New York Times Book Review, The New York Review of Books, the London Review of Books, the Dublin Review of Books, The Nation, Bookforum, and The New Yorker.



Literature, most generically, is any body of written works. More restrictively, literature refers to writing considered to be an art form or any single writing deemed to have artistic or intellectual value, often due to deploying language in ways that differ from ordinary usage.


Local government

Local government is a generic term for the lowest tiers of public administration within a particular sovereign state. This particular usage of the word government refers specifically to a level of administration that is both geographically-localised and has limited powers. While in some countries, “government” is normally reserved purely for a national administration (government) (which may be known as a central government or federal government), the term local government is always used specifically in contrast to national government – as well as, in many cases, the activities of sub-national, first-level administrative divisions (which are generally known by names such as cantons, provinces, states, or regions). Local governments generally act only within powers specifically delegated to them by law and/or directives of a higher level of government. In federal states, local government generally comprises a third or fourth tier of government, whereas in unitary states, local government usually occupies the second or third tier of government.



Locksmithing is the science and art of making and defeating locks. Locksmithing is a traditional trade and in many countries requires completion of an apprenticeship. The level of formal education legally required varies from country to country from none at all, to a simple training certificate awarded by an employer, to a full diploma from an engineering college (such as in Australia), in addition to time spent working as an apprentice.



Logic (from Greek: λογική, logikḗ, ‘possessed of reason, intellectual, dialectical, argumentative’) is the systematic study of valid rules of inference, i.e. the relations that lead to the acceptance of one proposition (the conclusion) on the basis of a set of other propositions (premises). More broadly, logic is the analysis and appraisal of arguments.

There is no universal agreement as to the exact definition and boundaries of logic (see § Rival conceptions). However, it has traditionally included the classification of arguments; the systematic exposition of the logical forms; the validity and soundness of deductive reasoning; the strength of inductive reasoning; the study of formal proofs and inference (including paradoxes and fallacies); and the study of syntax and semantics.


Logical reasoning

Two kinds of logical reasoning are often distinguished in addition to formal deduction: induction and abduction. Given a precondition or premise, a conclusion or logical consequence and a rule or material conditional that implies the conclusion given the precondition, one can explain the following.

Deductive reasoning determines whether the truth of a conclusion can be determined for that rule, based solely on the truth of the premises. Example: “When it rains, things outside get wet. The grass is outside, therefore: when it rains, the grass gets wet.” Mathematical logic and philosophical logic are commonly associated with this type of reasoning.
Inductive reasoning attempts to support a determination of the rule. It hypothesizes a rule after numerous examples are taken to be a conclusion that follows from a precondition in terms of such a rule. Example: “The grass got wet numerous times when it rained, therefore: the grass always gets wet when it rains.” This type of reasoning is commonly associated with generalization from empirical evidence. While they may be persuasive, these arguments are not deductively valid: see the problem of induction.
Abductive reasoning, sometimes called inference to the best explanation, selects a cogent set of preconditions. Given a true conclusion and a rule, it attempts to select some possible premises that, if true also, can support the conclusion, though not uniquely. Example: “When it rains, the grass gets wet. The grass is wet. Therefore, it might have rained.” This kind of reasoning can be used to develop a hypothesis, which in turn can be tested by additional reasoning or data. Diagnosticians, detectives, and scientists often use this type of reasoning.



Logistics is generally the detailed organization and implementation of a complex operation. In a general business sense, logistics is the management of the flow of things between the point of origin and the point of consumption to meet the requirements of customers or corporations. The resources managed in logistics may include tangible goods such as materials, equipment, and supplies, as well as food and other consumable items.

In military science, logistics is concerned with maintaining army supply lines while disrupting those of the enemy, since an armed force without resources and transportation is defenseless. Military logistics was already practiced in the ancient world and as the modern military has a significant need for logistics solutions, advanced implementations have been developed. In military logistics, logistics officers manage how and when to move resources to the places they are needed.

Logistics management is the part of supply chain management and supply chain engineering that plans, implements, and controls the efficient, effective forward, and reverse flow and storage of goods, services, and related information between the point of origin and point of consumption to meet customer’s requirements. The complexity of logistics can be modeled, analyzed, visualized, and optimized by dedicated simulation software. The minimization of the use of resources is a common motivation in all logistics fields. A professional working in the field of logistics management is called a logistician.



A logo (abbreviation of logotype, from Greek: λόγος, romanized: logos, lit. ’word’ and Greek: τύπος, romanized: typos, lit. ’imprint’) is a graphic mark, emblem, or symbol used to aid and promote public identification and recognition. It may be of an abstract or figurative design or include the text of the name it represents as in a wordmark.

In the days of hot metal typesetting, a logotype was one word cast as a single piece of type (e.g. “The” in ATF Garamond), as opposed to a ligature, which is two or more letters joined, but not forming a word. By extension, the term was also used for a uniquely set and arranged typeface or colophon. At the level of mass communication and in common usage, a company’s logo is today often synonymous with its trademark or brand.



Love encompasses a range of strong and positive emotional and mental states, from the most sublime virtue or good habit, the deepest interpersonal affection and to the simplest pleasure. An example of this range of meanings is that the love of a mother differs from the love of a spouse, which differs from the love of food. Most commonly, love refers to a feeling of strong attraction and emotional attachment.




Luck is the phenomenon and belief that defines the experience of notably positive, negative, or improbable events. The naturalistic interpretation is that positive and negative events may happen all the time, both due to random and non-random natural and artificial processes, and that even improbable events can happen by random chance. In this view, the epithet “lucky” or “unlucky” is a descriptive label that refers to an event’s positivity, negativity, or improbability.


Luxury apartment

A luxury apartment is a type of apartment that is intended to provide its occupant with higher-than-average levels of comfort, quality and convenience. While the term is often used to describe high-end regular apartments, or even typical apartments as a form of aspirational marketing, a true luxury apartment is one that is variously defined as being in the top 10% of transactions on the market or having a total value of more than $4–5 million US dollars, with “ultra-luxury” apartments being valued above US$10 million. However, it can also mean any apartment with extra amenities, such as a doorman, yoga studios or bowling alleys, among others.


Luxury goods

In economics, a luxury good (or upmarket good) is a good for which demand increases more than proportionally as income rises, so that expenditures on the good become a greater proportion of overall spending.

Luxury goods are in contrast to necessity goods, where demand increases proportionally less than income. Luxury goods is often used synonymously with superior goods.

The word “luxury” originated from the Latin word luxuria, which means exuberance, excess, abundance.


Luxury trains

Luxury trains are designed to offer a very comfortable ride and evoke an association with history and heritage. Operating in several countries, they are a premium travel option. Although some luxury trains promote tourism in destinations across a continent, others (such as the Maharajas’ Express) take passengers on a long, leisurely ride through a single country.

Luxury train travel has become popular, and its proponents cite several advantages over air travel. Although air travel can be monotonous, passengers on a luxury train can see the local environment, social and economic conditions, and a myriad of colors during their travels. Unlike airplanes, luxury trains are spacious and have restaurants and bars, comfortable sleeping and seating areas and bathrooms.