From Longman Dictionary of Contemporary Englishfarewell party/dinner/drink etcfarewell party/dinner/drink etcLEAVE A JOB OR ORGANIZATIONa party or dinner that you have because someone is leaving a job, city etc 40 of her colleagues gathered for her farewell presentation. → farewell
Examples from the Corpus
farewell party/dinner/drink etc• Worse awaited the Vietminh leader two evenings later, at a farewell dinner organized by Zhou.• A celebration, a farewell party.• On 8 August 1952 he and Joan gave a farewell party to Cambridge friends.• Kate's local women's group gives her a farewell party of disapproval veiled by loyalty.• She was then shown a picture taken at the farewell party at Champion Spark Plugs just before Paula went on maternity leave.• The farewell dinner is at the historic Abbey Tavern, located in the fishing village of Howth. 