Webster's Revised Unabridged Dictionary · 1913

Adagio

Adagio ({not transcribed}) , adjective and adverb

[Italian adagio; ad (Latin ad) at + agio convenience, leisure, ease. See Agio.]

(Music) Slow; slowly, leisurely, and gracefully. When repeated, adagio, adagio, it directs the movement to be very slow.

Adagio , noun

A piece of music in adagio time; a slow movement; as, an adagio of Haydn.