definition of
treble

[1] #1 treble s. [soprano] having or denoting a high range; "soprano voice"; "soprano sax"; "the boy still had a fine treble voice"; "the treble clef". wn

[2] #2 treble n. [soprano] the pitch range of the highest female voice. wn

[3] #3 treble v. sing treble. wn

[4] #4 treble v. [triple] increase threefold; "Triple your income!". wn

[5] #5 treble s. [threefold, three-fold, triple] three times as great or many; "a claim for treble (or triple) damages"; "a threefold increase". wn