Dith"y*ramb (?), n. [L. dithyrambus, Gr. &?; a kind of lyric poetry in honor of Bacchus; also, a name of Bacchus; of unknown origin: cf. F. dithyrambe.] A kind of lyric poetry in honor of Bacchus, usually sung by a band of revelers to a flute accompaniment; hence, in general, a poem written in a wild irregular strain. Bentley.