what is noun
Definition. A noun is traditionally defined as the part of speech (or word class) that names or identifies a person, place, thing, quality, or activity.Adjective: nominal. Most nouns have both a singular and plural form, can be preceded by an article and/or one or more adjectives, and can serve as the head of a noun phrase.efinition. A noun is traditionally defined as the part of speech (or word class) that names or identifies a person, place, thing, quality, or activity.