Dictionary
sing-a•long
Pronunciation: (sing'u-lông", -long"), [key]—
n.
1. an informal or unrehearsed singing of songs by a group of people, usually under the direction of a leader; songfest.
2. an occasion marked by such singing.
Also,sing'a•long".Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.