Word Origin & History
serenade1649, "musical performance at night in open air" (esp. one given by a lover under the window of his lady), from Fr. sérénade, from It. serenata "an evening song," lit. "calm sky," from sereno "the open air," noun use of sereno "clear, calm," from L. serenus "peaceful, calm, serene." Sense
infl. by It. sera "evening," from L. sera, fem. of serus "late." Meaning "piece of music suitable for a serenade" is attested from 1728. The verb is from 1668.