(uncountable) A form of entertainment popular in clubs, at parties, etc, in which individual members of the public sing along to pre-recorded instrumental versions of popular songs, the lyrics of which are displayed for the singer on a screen in time with the music.

(countable) A karaoke session.

(countable) A karaoke parlour.

(fitness) An exercise in which the feet are alternately placed in front of each other while walking sideways to stretch various parts of the lower body and core.

(intransitive) to perform karaoke