A farewell party held to send someone off (e.g., someone retiring or transferring).
今夜は先輩の歓送会なので、挨拶の準備をしている。
Tonight is the senior's farewell party, so I'm preparing my speech.
歓送会では写真や思い出話がよく話題になる。
At farewell parties, photos and memories often become topics of conversation.
歓送会のあと、同僚たちは彼を駅まで見送った。
After the farewell party, colleagues saw him off at the station.