Definitions

1. noun

relating to or characteristic of the god Bacchus, especially in a wild or excessive manner

“The party was a truly bacchanalian celebration, with music, dancing, and copious amounts of wine.”

2. adjective

excessively indulgent or extravagant, especially in the consumption of drink

“The bacchanalian lifestyle of the rock star was the subject of a scathing tabloid exposé.”