From Longman Dictionary of Contemporary Englishshort waveˈshort wave noun [uncountable] TCBa range of short radio waves used for broadcasting around the world → long wave, medium wave
Examples from the Corpus
short wave• It says that, in affected areas, only a minority listens on short wave.• Broadcasting was on short wave only and at such low power that the reception area was limited, scattered and unpredictable. 