Grammeme

Grammatical categories
Agency Animacy Associated motion Aspect Case Clusivity Comparison Definiteness Evidentiality Focus Gender Honorifics Mirativity Modality Mood Noun class Number Person Polarity Tense Topic Transitivity Valency Voice Volition

A grammeme in linguistics is a unit of grammar, just as a lexeme is a lexical unit and a morpheme is a morphological unit. (See emic unit.)

More specifically, a grammeme is a value of a grammatical category.^[1] For example, singular and plural are grammemes of the category of number.

References