adj. 1 vague, undefined. 2 unlimited. 3 Gram. not determining the person, thing, time, etc., referred to. indefinite article see ARTICLE. indefinite integral see INTEGRAL. indefinite pronoun Gram. a pronoun indicating a person, amount, etc., without being definite or particular, e.g. any, some, anyone. indefiniteness n.
[ L indefinitus (as IN-(1), DEFINITE) ]