- 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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for sing along
Online Etymology Dictionary, © 2010 Douglas Harper