In English, we distinguish between singular and plural.
This noun is often used in the singular.
Grammatical term specifically for the singular number, as opposed to plural (複数). Used in linguistics and language learning contexts.
See also: 複数
The singular of 'child' is 'child', and the plural is 'children'.
This noun is in the singular form.
This word is often used in the singular.
third-person singular
second-person singular