(grammar) A noun in which number is not marked; that is, a noun which does not change form in the plural, such as, in English, fish and series.

(grammar) A noun that modifies another noun attributively and that is optional (that is, it can be removed without affecting the grammar of the sentence); a noun used as an adjective.

plural of verbal noun

(linguistics) In Proto-Indo-European linguistics, a noun formed by adding inflectional endings directly to the root, with no intermediate suffixes.

A type of noun in Scottish Gaelic used as a numeral, only applied to persons. They exist for the numbers 1-10 only.

plural of noun clause

plural of numerical noun

uncountable noun

uncountable noun

(linguistics) A noun used without any apparent quantifier or determiner to modify it.