wah-wah for learners of EnglishPowered by COBUILD (wɑːwɑː)
uncountable noun [usu N n]
In music, wah-wah is used to describe the sound produced by covering and uncovering the open end of a brass instrument. This sound can also be produced electronically, especially when playing the electric guitar. ⇒ He played some wah-wah guitar.