get-together

Từ điển Oxford Advanced Learner 8th

ˈget-together [get-together get-togethers] BrE NAmE noun (informal)
an informal meeting; a party
•a family get-together at Christmas

Example Bank:
•I'm going back for the usual family get-together at Thanksgiving.
•Most of the students were more interested in social get-togethers than going to lectures.