equalizerPronunciation: /ˈiːkwəlʌɪzə/ (also equaliser)Translate equalizer | into German | into Italian | into Spanish Definition of equalizer noun 1a thing which has an equalizing effect:education is the great equalizer British a goal that levels the score in the game: his second goal was the equalizer 2North American informal a weapon, especially a gun. 3 Electronics a passive network designed to modify a frequency response, especially to compensate for distortion. equalizer in other Oxford dictionaries Definition of equalizer in the US English dictionary