- an informal or unrehearsed singing of songs by a group of people, usually under the direction of a leader; songfest.
- an occasion marked by such singing.
Origin of sing-along
First recorded in 1955–60; noun use of verb phrase sing along
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- to join in singing with a performer
- such a singsong
Word Origin and History for sing along
Online Etymology Dictionary, © 2010 Douglas Harper