wavelength/ˋwev͵lɛŋθ; ˈweIvleŋθ/n [C] 1 the size of radio wave used by a radio company to broadcast its programmes〔无线电的〕波长2 the distance between two waves of energy such as sound or light〔声波﹑光波等的〕波长3 be on the same wavelength to have the same opinions and feelings as someone else 与〔某人〕意见相同