[tre.ble] n [ME, perh. fr. MF, trio, fr. treble, adj.] (14c) 1 a: the highest voice part in harmonic music: soprano b: one that performs a treble part; also: a member of a family of instruments having the highest range c: a high-pitched or shrill voice, tone, or sound d: the upper half of the whole vocal or instrumental tonal range--compare bass e: the higher portion of the audio frequency range in sound recording and broadcasting
2: something treble in construction, uses, amount, number, or value
[2]treble adj [ME, fr. MF, fr. L triplus--more at triple] (14c) 1 a: having three parts or uses: threefold b: triple in number or amount
2. a: relating to or having the range or part of a treble b: high-pitched, shrill c: of, relating to, or having the range of treble in sound recording and broadcasting "~ frequencies" -- tre.bly adv [3]treble vb tre.bled ; tre.bling vt (14c): to increase threefold ~ vi 1: to sing treble
2: to grow to three times the size, amount, or number