ah, interj. [OE. a: cf. OF. a, F. ah, L. ah, Gr. , Sk. ā, Icel. æ, OHG. ā, Lith. á, áá.].
An exclamation, expressive of surprise, pity, complaint, entreaty, contempt, threatening, delight, triumph, etc., according to the manner of utterance. [1913 Webster]