superheterodynePronunciation: /ˌsuːpəˈhɛt(ə)rə(ʊ)dʌɪn, ˌsjuː-/Definition of superheterodyne adjective denoting or using a system of radio and television reception in which the receiver produces a tunable signal which is combined with the incoming signal to produce a predetermined intermediate frequency, on which most of the amplification is formed. noun a superheterodyne receiver. Origin: 1920s: from supersonic + heterodynesuperheterodyne in other Oxford dictionaries Definition of superheterodyne in the US English dictionary