noun
plural trebles
music
the highest range of sounds used in music [noncount]
[count] :a voice or instrument that has the highest range of sound
adjective
always used before a noun music :having or indicating a high sound or range
chiefly Brit :3triple
verb
trebles; trebled; trebling
chiefly Brit
[+ obj] :to cause (something) to become three times as great or as many :triple
[no obj] :to become three times as great or as many :triple