noun.
A frenzied, impassioned choric hymn and dance of ancient Greece in honor of Dionysus.
noun.
An irregular poetic expression suggestive of the ancient Greek dithyramb.
noun.
A wildly enthusiastic speech or piece of writing.
The Century Dictionary and Cyclopedia
noun.
A form of Greek lyric composition, originally a choral song in honor of Dionysus, afterward of other gods, heroes, etc.
the GNU version of the Collaborative International Dictionary of English
noun.
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.