or sing·a·long

[ sing-uh-lawng, -long ]
/ ˈsɪŋ əˌlɔŋ, -ˌlɒŋ /


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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for sing along

sing along

verb (intr, adverb)

to join in singing with a performer

noun sing-along

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