An orgiastic festival in ancient Greece in honor of Dionysus (= Bacchus)

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Dionysia \Di`o*ny"si*a\, n. pl. [L., fr. Gr. ?.] (Class. Antiq.) Any of the festivals held in honor of the Olympian god Dionysus. They correspond to the Roman Bacchanalia; the greater Dionysia were held at Athens in March or April, and were celebrated with ...

Wikipedia Word definitions in Wikipedia
Dionysia is a genus containing 49 species of flowering plants in the family Primulaceae. They are small, cushion-forming alpines native to mountains in central Asia. They are usually evergreen perennials with felted leaves, covered with bright yellow or ...

Wiktionary Word definitions in Wiktionary
n. The orgiastic Ancient Greek festivals seasonally held in honor of Dionysus, which evolved into Greek comedy and tragedy.