Common noun

In grammar, a noun is a word that denotes a concrete or abstract entity, like living creatures, places, actions, events, qualities, states of existence, and ideas. To summarize this, nouns signify an object or idea. A noun may serve as an object or subject within a phrase, clause, or sentence. In linguistics, nouns constitute a lexical category (part of speech) defined according to how its members combine with members of other lexical categories. The syntactic occurrence of nouns differs among languages. In English, prototypical nouns are common nouns or proper nouns that can occur with determiners, articles and attributive adjectives, and can function as the head of a noun phrase. According to traditional and popular classification, pronouns are distinct from nouns, but in much modern theory they are considered a subclass of nouns. Every language has various linguistic and grammatical distinctions between nouns and verbs. History Word classes (parts of speech) were described by Sanskrit grammarians from at least the 5th century BC. In Yāska's Nirukta, the noun (nāma) is one of the four main categories of words defined. The Ancient Greek equivalent was ónoma (ὄνομα), refer