Trĕb'le1, a.
(trĕb'l), a. [O. Fr. treble, treible, N. Fr. triple. See TRIPLE.] 1. Threefold; triple.
A lofty tower, and strong on every side With treble walls. Dryden.
Sense 2. (Mus.) (a.) Acute; sharp; as, a treble sound. Bacon. (b.) Playing or singing the highest part or most acute sounds; playing or singing the treble; as, a treble violin or voice.