1) a revel, carousal
1a) a nocturnal and riotous procession of half drunken and frolicsome fellows who after supper parade through the streets with torches and music in honour of Bacchus or some other deity, and sing and play before houses of male and female friends; hence used generally of feasts and drinking parties that are protracted till late at night and indulge in revelry
Part of Speech: noun masculine
From G2749; a carousal (as if a letting loose): - revelling, rioting.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root κῶμος; click on the second column to search for that grammatical form of the root κῶμος; click on the third column to search for that word and grammatical form; click on the total to search for the root κῶμος.