AORIST, among grammarians, a tense peculiar to the Greek language, comprehending all the tenses, or rather expressing an action in an indeterminate manner, without any regard to past, present, or future.

Aoust, a town of Piedmont in Italy, capital of the duchy of the same name, situated about 50 miles north of Turin, in 7^{\circ} 10' E. long. and 45^{\circ} 45' N. lat.