Definiteness In linguistics, definiteness is a semantic feature of noun phrases, distinguishing between referents or senses that are identifiable in a given context (definite noun phrases) and those which are not (indefinite noun phrases). The prototypical ...

is a feature of noun phrases in grammatical theory. Definiteness may also refer to: * Counterfactual definiteness, a concept in quantum mechanics * For the definiteness of forms in multilinear algebra, see Definite quadratic form.

See also