Aorist

n. [Gr. ἀόριστος, without boundaries, indefinite, from ἀ priv. and ὁρίζειν, to mark out boundaries, ὅρος, boundary, limit.] (Gram.) A tense in the Greek language, which expresses an action as completed in past time, but leaves it, in other respects, wholly indeterminate.

a. Indefinite or indeterminate as to past time. Harris.