a high-pitched voice, especially a boy's singing voice

the boy replied in a shrill treble

a relatively high-pitched member of a family of similar instruments

the high-frequency output of an audio system, corresponding to the treble in music

a superb tonal balance between the bass, mids, and treble

three sporting victories or championships in the same season, event, etc.

the victory completed a treble for the horse's trainer

a hit on the narrow ring enclosed by the two middle circles of a dartboard, scoring treble

a type of bet in which three selections are made, with any winnings from the first being transferred to the second and then (if successful) to the third

a thing that is three times as large as usual or is made up of three standard units or things

make or become three times as large or numerous

rents were doubled and probably trebled

his salary has trebled in a couple of years