sing-along

noun

ˈsiŋ-ə-ˌlȯŋ 

plural sing-alongs

: an informal session of group singing of popular or folk songs : songfest

People who had brought their guitars led spontaneous sing-alongs in the hotel lobby.

—The New Yorker

Old-fashioned hayrides and sing-alongs in front of a campfire …

—Mary Beth Giles

Audience participation is one of the things that has made the show a success, and there will, again, be plenty of opportunity to take part in the sing-alongs.

—Canadian Motorist

also : a song appropriate for a sing-along

A guy from the wedding party joined the band for the Garth Brooks classic sing-along "Friends in Low Places" and knocked it out of the park.

—Luke Vose

Word History

First Known Use

1959, in the meaning defined above