What is noun?

A noun is a word that represents a person, place, thing, or idea. It is one of the fundamental parts of speech in English grammar. Nouns can be singular or plural, and they can also be common or proper. Common nouns refer to general people, places, things, or ideas, while proper nouns refer to specific individuals, locations, or entities. Nouns are typically used as subjects or objects in sentences and can be modified by adjectives.