Definitions for "Dionysia"
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 elaborate performances of both tragedies and comedies.
Or "Great Dionysia" or "City Dionysia"; the week-long Athenian springtime festival in honor of Dionysus, which was, after 534 B.C., the major play-producing festival of the Greek year.
an orgiastic festival in ancient Greece in honor of Dionysus (= Bacchus)