What is the meaning of Treble?

High in pitch.

Pertaining to the highest singing voice or part in harmonized music; soprano.

Threefold, triple.

Trebly; triply.

The highest singing voice (especially as for a boy) or part in musical composition.

A person or instrument having a treble voice or pitch; a boy soprano.

The highest tuned in a ring of bells.

Any high-pitched or shrill voice or sound.

A threefold quantity or number; something having three parts or having been tripled.

A drink with three portions of alcohol; a triple

Any of the narrow areas enclosed by the two central circles on a dartboard, worth three times the usual value of the segment.

Three goals, victories, awards etc. in a given match or season.

To multiply by three; to make into three parts, layers, or thrice the amount.

To become multiplied by three or increased threefold.

To make a shrill or high-pitched noise.

To utter in a treble key; to whine.

Alternative form of tribble (frame for drying paper)

treble; triple

Source: wiktionary.org