Examples The cat sat on the mat. Please hand in your assignments by the end of the week. Cleanliness is next to Godliness. George Washington was the first president of the United States of America. Please complete this assignment with black or blue pen only and keep your eyes on your own paper.

A noun can co-occur with an article or an attributive adjective. Verbs and adjectives can't. In the following an asterisk (*) in front of an example means that this example is ungrammatical. the name (name is a noun: can co-occur with a definite article the.) *the baptize (baptize is a verb: cannot co-occur with a definite article.) constant circulation (circulation is a noun: can co-occur with the attributive adjective constant.) *constant circulate (circulate is a verb: cannot co-occur with the attributive adjective constant.) a fright (fright is a noun: can co-occur with the indefinite article a.) *an afraid (afraid is an adjective: cannot co-occur with the article a.) terrible fright (The noun fright can co-occur with the adjective terrible.) *terrible afraid (The adjective afraid cannot co-occur with the adjective terrible.)

In linguistics a noun is a member of a large open lexical category whose members can occur as the main word in the subject of a clause the object of a verb or the object of a preposition (or put more simply a noun is a word used to name a person animal place thing or abstract idea).1

Lexical categories are defined in terms of how their members combine with other kinds of expressions. The syntactic rules for nouns differ from language to language. In English nouns may be defined as those words which can occur with articles and attributive adjectives and can function as the head of a noun phrase.

In traditional English grammar the noun is one of the eight parts of speech. Contents 1 History 2 Different definitions of nouns 2.1 Names for things 2.2 Predicates with identity criteria 2.3 Prototypically referential expressions 3 Classification of nouns in English 3.1 Proper nouns and common nouns 3.2 Countable and uncountable nouns 3.3 Collective nouns 3.4 Concrete nouns and abstract nouns 4 Nouns and pronouns 5 Substantive as a word for noun 6 See also 7 References 7.1 Bibliography 8 External links History

Noun comes from the Latin nmen "name"2 a translation of Ancient Greek noma.3 Word classes like nouns were first described by Pini in the Sanskrit language and by Ancient Greek grammarians and were defined by the grammatical forms that they take. In Greek and Sanskrit for example nouns are categorized by gender and inflected for case and number.

Because nouns and adjectives share these three categories Dionysius Thrax does not clearly distinguish between the two and uses the term noma "name" for both although some of the words that he describes as paraggn (pl. paragg) "derived"4 are adjectives.5 Different definitions of nouns

Expressions of natural language have properties at different levels. They have formal properties like what kinds of morphological prefixes or suffixes they take and what kinds of other expressions they combine with; but they also have semantic properties i.e. properties pertaining to their meaning. The definition of a noun at the outset of this article is thus a formal traditional grammatical definition. That definition for the most part is considered uncontroversial and furnishes the means for users of certain languages to effectively distinguish most nouns from non-nouns. However it has the disadvantage that it does not apply to nouns in all languages. For example in Russian there are no definite articles so one cannot define nouns as words that are modified by definite articles. There have also been several attempts to define nouns in terms of their semantic properties. Many of these are controversial but some are discussed below. Names for things This section is written like a personal reflection or essay and may require cleanup. Please help improve it by rewriting it in an encyclopedic style. (February 2011)

In traditional school grammars one often encounters the definition of nouns that they are all and only those expressions that refer to a person place thing event substance quality quantity or idea etc. This is a semantic definition. It has been criticized by contemporary linguists as being uninformative.6 Contemporary linguists generally agree that one cannot successfully define nouns (or other grammatical categories) in terms of what sort of object in the world they refer to or signify. Part of the conundrum is that the definition makes use of relatively general nouns (thing phenomenon event) to define what nouns are. The existence of such general nouns demonstrates that nouns refer to entities that are organized in taxonomic hierarchies. But other kinds of expressions are also organized into such structured taxonomic relationships. For example the verbs stroll saunter stride and tread are more specific words than the more general walk see Troponymy. Moreover walk is more specific than the verb move which in turn is less general than change. But it is unlikely that such taxonomic relationships can be used to define nouns and verbs. We cannot define verbs as those words that refer to changes or states for example because the nouns change and state probably refer to such things but of course are not verbs. Similarly nouns like invasion meeting or collapse refer to things that are done or happen. In fact an influential theory has it that verbs like kill or die refer to events78 one of the categories of things that nouns are supposed to refer to. The point being made here is not that this view of verbs is wrong but rather that this property of verbs is a poor basis for a definition of this category just like the property of having wheels is a poor basis for a definition of cars (some things that have wheels such as most suitcases or a jumbo jet aren't cars). Similarly adjectives like yellow or difficult might be thought to refer to qualities and adverbs like outside or upstairs seem to refer to places which are also among the sorts of things nouns can refer to. But verbs adjectives and adverbs are not nouns and nouns are not verbs adjectives or adverbs. One might argue that definitions of this sort really rely on speakers' prior intuitive knowledge of what nouns verbs and adjectives are and so do not really add anything. Speakers' intuitive knowledge of such things might plausibly be based on formal criteria such as the traditional grammatical definition of English nouns aforementioned. Predicates with identity criteria This section may be confusing or unclear to readers. Please help clarify the section; suggestions may be found on the talk page. (April 2009) The British logician Peter Thomas Geach proposed a more subtle semantic definition of nouns.9 He noticed that adjectives like "same" can modify nouns but no other kinds of parts of speech like verbs or adjectives. Not only that but there also do not seem to be any other expressions with similar meaning that can modify verbs and adjectives. Consider the following examples. grammatical: John and Bill participated in the same fight. ungrammatical: *John and Bill samely fought. There is no English adverb samely. In some other languages like Czech however there are adverbs corresponding to samely. Hence in Czech the translation of the last sentence would be fine; however it would mean that John and Bill fought in the same way: not that they participated in the same fight. Geach proposed that we could explain this if nouns denote logical predicates with identity criteria. An identity criterion would allow us to conclude for example that person x at time 1 is the same person as person y at time 2. Different nouns can have different identity criteria. A well known example of this is due to Gupta:10 National Airlines transported 2 million passengers in 1979. National Airlines transported (at least) 2 million persons in 1979. Given that in general all passengers are persons the last sentence above ought to follow logically from the first one. But it doesn't. It is easy to imagine for example that on average every person who travelled with National Airlines in 1979 travelled with them twice. In that case one would say that the airline transported 2 million passengers but only 1 million persons. Thus the way that we count passengers isn't necessarily the same as the way that we count persons. Put somewhat differently: At two different times you may correspond to two distinct passengers even though you are one and the same person. For a precise definition of identity criteria see Gupta.10 Prototypically referential expressions This section may be confusing or unclear to readers. Please help clarify the section; suggestions may be found on the talk page. (April 2010) Another semantic definition of nouns is that they are prototypically referential.11 Recently Mark Baker12 has proposed that Geach's definition of nouns in terms of identity criteria allows us to explain the characteristic properties of nouns. He argues that nouns can co-occur with (in-)definite articles and numerals and are prototypically referential because they are all and only those parts of speech that provide identity criteria. Baker's proposals are quite new and linguists are still evaluating them. Classification of nouns in English Proper nouns and common nouns Main article: Proper noun A proper noun or proper name is a noun representing unique entities (such as London Jupiter Larry or Toyota) as distinguished from common nouns which describe a class of entities (such as city planet person or car).13 Countable and uncountable nouns Main articles: Count noun and Mass noun Count nouns are common nouns that can take a plural can combine with numerals or quantifiers (e.g. one two several every most) and can take an indefinite article (a or an). Examples of count nouns are chair nose and occasion. Mass nouns (or non-count nouns) differ from count nouns in precisely that respect: they can't take plural or combine with number words or quantifiers. Examples from English include laughter cutlery helium and furniture. For example it is not possible to refer to a furniture or three furnitures. This is true even though the pieces of furniture comprising furniture could be counted. Thus the distinction between mass and count nouns should not be made in terms of what sorts of things the nouns refer to but rather in terms of how the nouns present these entities.1415 Collective nouns Main article: Collective noun Collective nouns are nouns that refer to groups consisting of more than one individual or entity even when they are inflected for the singular. Examples include committee herd and school (of fish). These nouns have slightly different grammatical properties than other nouns. For example the noun phrases that they head can serve as the subject of a collective predicate even when they are inflected for the singular. Concrete nouns and abstract nouns Further information: physical body and abstract object Concrete nouns refer to physical entities that can in principle at least be observed by at least one of the senses (for instance chair apple Janet or atom). Abstract nouns on the other hand refer to abstract objects; that is ideas or concepts (such as justice or hatred). While this distinction is sometimes exclusive some nouns have multiple senses including both concrete and abstract ones; consider for example the noun art which usually refers to a concept (e.g. Art is an important element of human culture) but which can refer to a specific artwork in certain contexts (e.g. I put my daughter's art up on the fridge). Some abstract nouns developed etymologically by figurative extension from literal roots. These include drawback fraction holdout and uptake. Similarly some nouns have both abstract and concrete senses with the latter having developed by figurative extension from the former. These include view filter structure and key. In English many abstract nouns are formed by adding noun-forming suffixes (-ness -ity -ion) to adjectives or verbs. Examples are happiness (from the adjective happy) circulation (from the verb circulate) and serenity (from the adjective serene). Nouns and pronouns Nouns and noun phrases can typically be replaced by pronouns such as he it which and those in order to avoid repetition or explicit identification or for other reasons. For example in the sentence Janet thought that he was weird the word he is a pronoun standing in place of the name of the person in question. The English word one can replace parts of noun phrases and it sometimes stands in for a noun. An example is given below: John's car is newer than the one that Bill has. But one can also stand in for bigger subparts of a noun phrase. For example in the following example one can stand in for new car. This new car is cheaper than that one. Substantive as a word for noun "Substantive" redirects here. For other uses see Substance (disambiguation). Starting with old Latin grammars many European languages use some form of the word substantive as the basic term for noun (for example Spanish sustantivo "noun"). Nouns in the dictionaries of such languages are demarked by the abbreviation s. or sb. instead of n which may be used for proper nouns instead. This corresponds to those grammars in which nouns and adjectives phase into each other in more areas than for example the English term predicate adjective entails. In French and Spanish for example adjectives frequently act as nouns referring to people who have the characteristics of the adjective. The most common metalanguage to name this concept is nominalization. An example in English is: This legislation will have the most impact on the poor. Similarly an adjective can also be used for a whole group or organization of people: The Socialist International. Hence these words are substantives that are usually adjectives in English. The word nominal also overlaps in meaning and usage with noun and adjective. See also Description Grammatical case Phi features Reference v d eLexical categories and their features Noun Abstract/Concrete  Adjectival  Agent  Animate/Inanimate  Attributive  Collective  Common/Proper  Countable  Deverbal  Initial-stress-derived  Mass  Relational  Strong  Verbal  Weak Verb Verb forms Finite  Non-finite Attributive  Converb  Gerund  Gerundive  Infinitive  Participle (adjectival  adverbial)  Supine  Verbal noun Verb types Accusative  Ambitransitive  Andative/Venitive  Anticausative  Autocausative  Auxiliary  Captative  Catenative  Compound  Copular  Defective  Denominal  Deponent  Ditransitive  Dynamic  ECM  Ergative  Frequentative  Impersonal  Inchoative  Intransitive  Irregular  Lexical  Light  Modal  Monotransitive  Negative  Performative  Phrasal  Predicative  Preterite-present  Reflexive  Regular  Separable  Stative  Stretched  Strong  Transitive  Unaccusative  Unergative  Weak Adjective Collateral  Demonstrative  Possessive  Post-positive Adverb Genitive  Conjunctive  Flat  Prepositional  Pronomial Pronoun Demonstrative  Disjunctive  Distributive  Donkey  Dummy  Formal/Informal  Gender-neutral  Gender-specific  Inclusive/Exclusive  Indefinite  Intensive  Interrogative  Objective  Personal  Possessive  Prepositional  Reciprocal  Reflexive  Relative  Resumptive  Subjective  Weak Preposition Inflected  Casally modulated Conjunction Determiner Article  Demonstrative  Interrogative  Possessive  Quantifier Classifier Particle Discourse  Modal  Noun Complementizer Other Copula  Coverb  Expletive  Interjection (verbal)  Measure word  Preverb  Pro-form  Pro-sentence  Pro-verb  Procedure word References Loos Eugene E. et al. 2003. Glossary of linguistic terms: What is a noun nmen. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project. . Liddell Henry George; Scott Robert; A Greek-English Lexicon at Perseus Project  in Liddell and Scott Dionysius Thrax. (Art of Grammar) section (10b): (On the noun). Bibliotheca Augustana. . There are seven types of derived nouns: patronymic possessive comparative superlative diminutive derived from a noun and verbal. Jackendoff Ray. 2002. Foundations of language: brain meaning grammar evolution. Oxford University Press. Page 124. Davidson Donald. 1967. The logical form of action sentences. In Nicholas Rescher ed. The Logic of Decision and Action Pittsburgh Pa: University of Pittsburgh Press. Parsons Terence. 1990. Events in the semantics of English: a study in subatomic semantics. Cambridge Mass.:MIT Press Geach Peter. 1962. Reference and Generality. Cornell University Press. a b Gupta Anil. 1980 The logic of common nouns. New Haven and London: Yale University Press. Croft William. 1993. "A noun is a noun is a noun - or is it Some reflections on the universality of semantics". Proceedings of the Nineteenth Annual Meeting of the Berkeley Linguistics Society ed. Joshua S. Guenter Barbara A. Kaiser and Cheryl C. Zoll 369-80. Berkeley: Berkeley Linguistics Society. Baker Mark. 2003 Lexical Categories: verbs nouns and adjectives. Cambridge University Press Cambridge. Lester Mark; Larry Beason (2005). The McGraw-Hill Handbook of English Grammar and Usage. McGraw-Hill. p. 4. ISBN 0-07-144133-6.  Krifka Manfred. 1989. "Nominal Reference Temporal Constitution and Quantification in Event Semantics". In R. Bartsch J. van Benthem P. von Emde Boas (eds.) Semantics and Contextual Expression Dordrecht: Foris Publication. Borer Hagit. 2005. In Name Only. Structuring Sense Volume I. Oxford: Oxford University Press. Bibliography Laycock Henry 2005 'Mass nouns Count nouns and Non-count nouns' Draft version of entry in Encyclopedia of Language and Linguistics Oxford: Elsevier (pdf) External links Look up noun in Wiktionary the free dictionary. Nouns - Singular and Plural Agreement ESL Guide to Countable and Uncountable Nouns Nouns