Webster's Revised Unabridged Dictionary · 1913

Encore

Encore , adv. o interj.

[F. The last part of the word is from Latin hora hour. See Hour.]

Once more; again; -- used by the auditors and spectators of plays, concerts, and other entertainments, to call for a repetition of a particular part.

Encore , noun

A call or demand (as, by continued applause) for a repetition; as, the encores were numerous.

Encore , transitive verb

To call for a repetition or reappearance of; as, to encore a song or a singer.
[Rebecca] insisted upon encoring one of the duets. — Thackeray