1.  bacchanalia(n = noun.act) dionysia - an orgiastic festival in ancient Greece in honor of Dionysus (= Bacchus);
is a kind of festival, fete

2.  bacchanalia(n = noun.act) bacchanal, debauch, debauchery, drunken revelry, orgy, riot, saturnalia - a wild gathering involving excessive drinking and promiscuity;
is a kind of revel, revelry

1.  A feast or an orgy in honor of Bacchus. [1913 Webster]

2.  Hence: A drunken feast; drunken revels; an orgy. [1913 Webster]

bacchanalia, n.pl.
1 the Roman festival of Bacchus.
2 (bacchanalia) a drunken revelry.

Derivative:
Bacchanalian adj. & n.

Etymology:
L, neut. pl. of bacchanalis: see BACCHANAL

N  drunkenness, intemperance, drinking, inebriety, inebriation, ebriety, ebriosity, insobriety, intoxication, temulency, bibacity, wine bibbing, comtation, potation, deep potations, bacchanals, bacchanalia, libations, bender, oinomania, dipsomania, delirium tremens, alcohol, alcoholism, mania a potu, drink, alcoholic drinks, blue ruin, grog, port wine, punch, punch bowl, cup, rosy wine, flowing bowl, drop, drop too much, dram, beer, aguardiente, apple brandy, applejack, brandy, brandy smash, chain lightning, champagne, cocktail, gin, ginsling, highball, peg, rum, rye, schnapps, sherry, sling, uisquebaugh, usquebaugh, whisky, xeres, drunkard, sot, toper, tippler, bibber, wine-bibber, lush, hard drinker, gin drinker, dram drinker, soaker, sponge, tun, love pot, toss pot, thirsty soul, reveler, carouser, Bacchanal, Bacchanalian, Bacchal, Bacchante, devotee to Bacchus, bum, guzzler, tavern haunter, drunk, tipsy, intoxicated, inebrious, inebriate, inebriated, in one's cups, in a state of intoxication, temulent, temulentive, bombed, smashed, fuddled, mellow, cut, boozy, fou, fresh, merry, elevated, flustered, disguised, groggy, beery, top-heavy, potvaliant, glorious, potulent, squiffy, overcome, overtaken, whittled, screwed, tight, primed, corned, raddled, sewed up, lushy, nappy, muddled, muzzy, obfuscated, maudlin, crapulous, dead drunk, woozy, buzzed, flush, flushed, inter pocula, in liquor, the worse for liquor, having had a drop too much, half seas over, three sheets in the wind, three sheets to the wind, under the table, drunk as a lord, drunk as a skunk, drunk as a piper, drunk as a fiddler, drunk as Chloe, drunk as an owl, drunk as David's sow, drunk as a wheelbarrow, drunken, bibacious, sottish, given to drink, addicted to drink, addicted to the bottle, toping, nunc est bibendum, Bacchus ever fair and young, drink down all unkindness, O that men should put an enemy in their mouths to.