farewell party; send-off party
A gathering held to say goodbye to someone who is leaving a workplace, school, group, or area. Common in work and school contexts.
We will hold a farewell party for Tanaka next week.
We gave her a bouquet at the farewell party.
We decided to hold a farewell party for the section chief.
I plan to attend my senior colleague's farewell party today.
A farewell party will be held for the department manager next week.
The company organized a farewell party for the employee who was retiring.