The dithyramb was an ancient Greek hymn sung and danced in honor of Dionysus, the god of wine and fertility; the term was also used as an epithet of the god. Plato, in The Laws, while discussing various kinds of music mentions "the birth of Dionysos, called, I think, the dithyramb." Plato also remarks in the Republic that dithyrambs are the clearest example of poetry in which the poet is the only speaker.

In ancient Greek religion and myth, Dionysus is the god of wine-making, orchards and fruit, vegetation, fertility, festivity, insanity, ritual madness, religious ecstasy, and theatre. He was also known as Bacchus by the Greeks for a frenzy he is said to induce called baccheia. As Dionysus Eleutherius, his wine, music, and ecstatic dance free his followers from self-conscious fear and care, and subvert the oppressive restraints of the powerful. His thyrsus, a fennel-stem sceptre, sometimes wound with ivy and dripping with honey, is both a beneficent wand and a weapon used to destroy those who oppose his cult and the freedoms he represents. Those who partake of his mysteries are believed to become possessed and empowered by the god himself.