Music sung or played by a lover under the window of a lady.

(情人在女友窗下所唱或演奏之)情歌。

A piece of music fitted to such an occasion.

适合作情歌的乐曲。

To perform a serenade in honor of; to play a serenade.

对...唱(奏)小夜曲；唱(奏)小夜曲。