celebrate noisily, often indulging in drinking; engage in uproarious festivities; "The members of the wedding party made merry all night"; "Let's whoop it up--the boss is gone!"
the main meal of the day served in the evening or at midday; "dinner will be at 8"; "on Sundays they had a large dinner when they returned from church"
a party of people assembled to have dinner together; "guests should never be late to a dinner party"