Noun (Noun)

A content word that can be used to refer to a person, place, thing, quality, or action.

Nouns denoting communicative processes and contents.

The word "city" is a noun that refers to a place where people live and work.
In the sentence "The teacher gave the student a book", "teacher", "student", and "book" are all nouns.
The noun "happiness" refers to a positive emotional state or quality.
The term "nurse" is a noun that refers to a person who cares for sick people.
In the context of linguistics, a noun can also refer to an action or activity, such as "running" or "writing".

The word class that can serve as the subject or object of a verb, the object of a preposition, or in apposition.

Nouns denoting communicative processes and contents.

In the sentence "The dog is running," "dog" is a noun that serves as the subject of the verb "is running."
The words "city," "river," and "university" are all nouns in the sentence "The university is located in the city beside the river."
Nouns can function as direct objects, as in the sentence "She ate a sandwich."
In the phrase "the president of the company," "president" is a noun that functions as an appositive, renaming or re-identifying the noun that precedes it.
The noun "book" serves as the object of the preposition "in" in the sentence "The key is hidden in a book."