A social gathering or event, especially a formal one.
Parties are usually fun and happy events where people get together to celebrate or have a good time.
Examples:
We are going to a parti tonight.
Her birthday parti was a lot of fun.
I like to play games at parti.
I don't want to go to the parti, I want to stay home and sleep.
At the parti, there were a million people!
The parti was the best one I ever went to.