A large or important social gathering
We'll be going to a soiree across the street in about an hour.
There was never a dinner or soiree at the club without him.
The street below was narrower than it appeared on TV and packed with cars and elegantly dressed men and women walking to a gathering across the street --probably the soiree Andre had mentioned.
Perhaps you just feel a bit chilly during a fall soiree with close friends, but don't want to ruin your outfit's fluidity with a chunky cover-up.