What is "count noun"

n. A noun which refers to something that can be counted. Examples: house, car, bush, point.

n. a noun that forms plurals

In linguistics, a count noun (also countable noun) is a noun that can be modified by a numeral and that occurs in both singular and plural forms, and that co-occurs with quantificational determiners like every, each, several, etc. A mass noun has none of these properties. It can't be modified by a numeral, occur in singular/plural, or co-occur with quantificational determiners.