sing-along

US: (sing′ə lông′, -long′)

WordReference Random House Learner's Dictionary of American English © 2025

ˈsing-aˌlong,  n. 

1. Music and Dance songfest.

WordReference Random House Unabridged Dictionary of American English © 2025

sing-a•long  (sing′ə lông′, -long′), n. 

1. Music and Dance an informal or unrehearsed singing of songs by a group of people, usually under the direction of a leader;
   songfest.
2. Music and Dance an occasion marked by such singing.

Also, sing′a•long′. 

• noun, nominal use of verb, verbal phrase sing along 1955–60