Noun can function as a subject, object, appositive, object complement but the amount of nouns or pronouns being used in a sentence determines the number of the noun.
Based on the same, noun can be categorized into 2 types – Singular and Plural.
A noun is called singular when there is only one object or subject being denoted. For example – The chair is broken.
On the other hand, a noun is called plural when there are more than one or a collection of objects or subjects being used. For example – The chairs are broken.
The definition of noun is colloquially given as any name, place, animal or thing. It is a word attributed to any object or collection of objects, be it creatures, manners, state of living or notions. Nouns are majorly of 8 types – Proper noun, Common noun, Concrete noun, Abstract noun, Collective noun, Compound noun, Countable noun, and non-countable nouns. Noun is one of the most important among the 8 parts of speech. It can function as a subject, object (direct or indirect), subject complement, predicative nominative, object complement, appositive, nominative absolute or object of a preposition.