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This biohazard sign is a completely conventional symbol with no inherent relationship to what it represents.

This "no smoking" symbol combines the conventional "no" symbol with a somewhat abstracted image of a cigarette.

A sign is an entity which signifies another entity. A natural sign is an entity which bears a causal relation to the signified entity, as thunder is a sign of storm. A conventional sign signifies by agreement, as a full stop signifies the end of a sentence. (Contrast a symbol which stands for another thing, as a flag may be a symbol of a nation) Image File history File links Merge-arrow. ... In semiotics, a sign is generally defined as, ...something that stands for something else, to someone in some capacity. ... Look up sign in Wiktionary, the free dictionary. ... Wikipedia does not have an article with this exact name. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ... Image File history File links Biohazard. ... Image File history File links Biohazard. ... Biological hazard. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Two unlit filtered cigarettes. ...

The way in which a sign signifies is a topic in philosophy of language, see also Meaning (linguistic) Philosophy of language is the reasoned inquiry into the nature, origins, and usage of language. ... In linguistics, meaning is the content carried by the words or signs exchanged by people when communicating through language. ...

Any given signifier or symbol is dependent upon that which is intended, expressed, or signified in a semiotic relationship of signification, significance, meaning, or import. Thus, for example, people may speak of the significance of events, the signification of characters, the meaning of sentences, or the import of a communication. These different relationships that exist between sorts of signs can help people and sorts of things that are signified can be called the modes of signification. Semiotics (also spelled Semeiotics) is the study of signs and sign systems. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ...

The range of uses of signs are varied. They might include: the indication or mark of something, a display of a message, a signal to draw attention, evidence of an underlying cause (for instance, the symptoms of a disease are signs of the disease), a character for a mathematical operation, a body gesture, etc.

Nature of Signs

Semiotics, epistemology, logic, and philosophy of language are concerned about the nature of signs, what they are and how they signify. The nature of signs and symbols and significations, their definition, elements, and types, is mainly established by Aristotle, Augustine, and Aquinas. According to these classic sources, significance is a relationship between two sorts of things: signs and the kinds of things they signify (intend, express or mean), where one term necessarily causes something else to come to the mind. Distinguishing natural signs and conventional signs, the traditional theory of signs sets the following threefold partition of things: Semiotics, semiotic studies, or semiology is the study of signs and symbols, both individually and grouped into sign systems. ... It has been suggested that Meta-epistemology be merged into this article or section. ... Philosophy of language is the reasoned inquiry into the nature, origins, and usage of language. ... This article is about the philosopher. ... “Augustinus” redirects here. ... Saint Thomas Aquinas (1225 - March 7, 1274) was a Catholic philosopher and theologian in the scholastic tradition, who gave birth to the Thomistic school of philosophy, which was long the primary philosophical approach of the Roman Catholic Church. ...

1. There are things that are just things, not any sign at all;
2. There are things that are also signs of other things (as natural signs of the physical world and mental signs of the mind);
3. There are things that are always signs, as languages (natural and artificial) and other cultural nonverbal symbols, as documents, money, ceremonies, and rites.

Thus there are things which may act as signs without any respect to the human agent (the things of the external world, all sorts of indications, evidences, symptoms, and physical signals), there are signs which are always signs (the entities of the mind as ideas and images, thoughts and feelings, constructs and intentions); and there are signs that have to get their signification (as linguistic entities and cultural symbols). So, while natural signs serve as the source of signification, the human mind is the agency through which signs signify naturally occurring things, such as objects, states, qualities, quantities, events, processes, or relationships. Human language and discourse, communication, philosophy, science, logic, mathematics, poetry, theology, and religion are only some of fields of human study and activity where grasping the nature of signs and symbols and patterns of signification may have a decisive value. Discourse is a term used in semantics as in discourse analysis, but it also refers to a social conception of discourse, often linked with the work of French philosopher Michel Foucault (1926-1984) and Jürgen Habermas The Theory of Communicative Action (1985). ... Communication is a process that allows organisms to exchange information by several methods. ... For other uses, see Philosophy (disambiguation). ... Part of a scientific laboratory at the University of Cologne. ... Logic (from Classical Greek λόγος logos; meaning word, thought, idea, argument, account, reason, or principle) is the study of the principles and criteria of valid inference and demonstration. ... Euclid, Greek mathematician, 3rd century BC, as imagined by by Raphael in this detail from The School of Athens. ... This article is about the art form. ... Theology finds its scholars pursuing the understanding of and providing reasoned discourse of religion, spirituality and God or the gods. ...

Types of signs

A sign can denote any of the following:

A signboard on a beach in Durban in apartheid-era South Africa indicates a racially segregated beach.

• Sign, in astrology, often used to mean the Sun sign
• Sign or signing, in communication, refers to communicating via hand gestures, such as sign language.
• A signboard.
• Signedness, in computing, the digits where one bit among them denotes whether the number is either negative or non-negative, are called signed, otherwise unsigned. See also signed number representation
• Sign, in common use, refers to an indication that a previously observed event is about to occur again
• Sign, in divination and religion, an omen, an event or occurrence believed to foretell the future
• Sign, in ontology and spirituality, a coincidence; see synchronicity
• Sign (linguistics), a combination of a concept and a sound-image described by Ferdinand de Saussure
• Sign, in mathematics, whether a number is negative or positive
• Sign, in biology, an indication of some living thing's presence
• Medical sign, in medicine, objective evidence of the presence of a disease or disorder, as opposed to a symptom, which is subjective
• Sign (semiotics), the basic units of meaning
• Information sign, a notice that instructs, advises, informs or warns people
• Traffic sign, signs that instruct drivers; see also stop signs, speed limit signs, cross walk signs
• Sign, in a writing system, a basic unit. Similar terms which are more specific are character, letter or grapheme
• Commercial signage, including flashing signs, such as on a retail store, factory, or theatre
• Signature, in history, a handwritten depiction observed on a document to show authorship and will

Image File history File links Download high resolution version (512x800, 59 KB) Summary Taken and donated by John Mullen. ... Image File history File links Download high resolution version (512x800, 59 KB) Summary Taken and donated by John Mullen. ... A grammatically incorrect sign, posted at the back door of a pizza shop in Niagara Falls, Canada. ... Map of South Africa showing Durbans location. ... A segregated beach in South Africa, 1982. ... The Rex Theatre for Colored People Racial segregation is characterised by separation of different races in daily life, such as eating in a restaurant, drinking from a water fountain, using a rest room, attending school, going to the movies, or in the rental or purchase of a home[1]. Segregation... Hand-coloured version of the anonymous Flammarion woodcut (1888). ... Western astrology employs the tropical zodiac which divides the ecliptic into twelve signs of equal length starting at the first point of Aries, which is defined as the point at which the ecliptic (the apparent path of the Sun through the heavens) crosses the celestial equator at the spring equinox. ... Two sign language Intepreters working as a team for a school. ... A grammatically incorrect sign, posted at the back door of a pizza shop in Niagara Falls, Canada. ... Signedness is a property of an integer number used by a compiler to indicate if variables of a numeric type are capable of storing both positive and negative numbers, or just positive. ... Comparison of Integer Representations in 4-bit In mathematics, negative numbers in any base are represented in the usual way, by prefixing them with a − sign. ... For other uses, see Divination (disambiguation). ... Examples of omens from the Nuremberg Chronicle (1493): natural phenomena and strange births. ... This article is about ontology in philosophy. ... Spirituality, in a narrow sense, concerns itself with matters of the spirit. ... Coincidence is the noteworthy alignment of two or more events or circumstances without obvious causal connection. ... Synchronicity is the experience of two or more events which occur in a meaningful manner, but which are causally inexplicable to the person or persons experiencing them. ... In general linguistics Ferdinand de Saussure described a sign as a combination of a concept and a sound-image. ... Euclid, Greek mathematician, 3rd century BC, as imagined by by Raphael in this detail from The School of Athens. ... A negative number is a number that is less than zero, such as −3. ... In medicine, a sign is a feature of disease as detected by the doctor during physical examination of a patient. ... For the chemical substances known as medicines, see medication. ... The term symptom (from the Greek meaning chance, mishap or casualty, itself derived from συμπιπτω meaning to fall upon or to happen to) has two similar meanings in the context of physical and mental health: Strictly, a symptom is a sensation or change in health function experienced by a patient. ... In semiotics, a sign is generally defined as, ...something that stands for something else, to someone in some capacity. ... A stop sign informs drivers to stop. ... Unused traffic signs in Austria Most countries post signage, known as traffic signs or road signs, at the side of roads to impart information to road users. ... Stop sign used in English-speaking countries, as well as in the European Union Former British stop sign consisting of red Give Way triangle inside a circle. ... A road speed limit is the maximum speed allowed by law for road vehicles. ... ... Writing systems of the world today. ... In typography, a grapheme is the atomic unit in written language. ... Multiple logos on the Virgin Megastore in San Francisco, California . Los Angeles famous Hollywood sign, now a symbol the entertainment industry, originally said Hollywoodland, and advertised a real estate development. ... A flashing sign is a sign that contains a sequential flashing light source where the period of time of illumination is equal to the period of non-illumination, and is used solely to attract attention in a non-informative way. ... For other uses, see Signature (disambiguation). ...

See also

Wikimedia Commons has media related to:

signs

• Charles Sanders Peirce
• Claude Levi-Strauss
• Divination
• Edmund Leach
• Ferdinand de Saussure
• Icon
• Icon (computing)
• Ideogram
• Interpretation of dreams
• List of symbols
• Logotype
• Map-territory relation
• Mary Douglas
• National symbol
• Religious symbolism
• Representation
• Roland Barthes
• Semiotics
• Signing
• Structuralism
• Symbol
• Synchronicity
• Traffic sign