noun
plural -mances
[count] an activity (such as singing a song or acting in a play) that a person or group does to entertain an audience
the way an actor performs a part in a play, movie, etc.
somewhat formal :the act of doing a job, an activity, etc. [noncount]
how well someone or something functions, works, etc. :how well someone or something performs [count]
[singular] Brit informal :an act that requires a lot of time and effort