1. three times as much or as many; triple

1. the highest singing voice or musical part
2. a high-pitched sound or tone

1. to make or become three times as much or as many

Examples

• The company’s profits showed treble growth this year.
• She sang the treble part in the church choir.
• Turn down the treble on the stereo system.
• The population trebled in just two decades.
• He paid treble damages for breaking the contract.
• The treble clef indicates high musical notes.
• Sales are expected to treble by next quarter.