A noun that can be counted or divided easily is a count noun For example, the nouns "friend" and "school" are count nouns
Nouns that have both singular and plural forms because they can be counted: one ball, two balls
A count noun is a noun such as `bird', `chair', or `year' which has a singular and a plural form and is always used after a determiner in the singular. = countable noun. A noun for an object, such as chair, or for an idea, such as experience, that speakers of a language identify as referring to a single entity and that can form a plural or occur in a noun phrase construction with an indefinite article, with numerals, or with such terms as many. a noun that has both a singular and plural form and can be used with 'a' or 'an' noun