Definition;Noun

Noun

 * 1) Any member of a class of words that can function as the main or only elements of subjects of verbs, or of objects of verbs or prepositions, and that in English can take plural forms and possessive endings. Nouns are often described as referring to persons, places, things, states, or qualities.
 * 2) A word (other than a pronoun) used to identify any of a class of people, places, or things (common noun), or to name a particular one of these (proper noun).

See Also;

 * Common Noun
 * Proper Noun