again; once more (used by an audience in calling for an additional number or piece).

a demand, as by applause, for a repetition of a song, act, etc., or for a performance of a number or piece additional to those on a program, or for a reappearance by the performers, as at the end of a concert, recital, etc.

the performance or reappearance in response to such a demand

He chose a Chopin nocturne for his encore.

any repeated or additional performance or appearance, as a rerun of a telecast or a rematch in sports.

to call for a repetition of.

to call for an encore from (a performer).

noun

acclamation , cheers , number , plaudits , praise , reappearance , repeat performance , repetition , response , return , again , anew , bis , recall , repeat