From Longman Dictionary of Contemporary Englishlong waveˈlong ˌwave noun [uncountable] (written abbreviation LW) TCBradio broadcasting or receiving on waves of 1,000 metres or more in length → medium wave, short wave, FM
Examples from the Corpus
long wave• It is on the basis of this that the latest - fifth - long wave is emerging.• And make use of long wave.• Thus short-wave radiation, which has more energy, is likely to be more dangerous than long wave. 