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Definition of long wave noun from the Oxford Advanced Learner's Dictionary

long wave

noun
 
/ˈlɒŋ weɪv/
 
/ˈlɔːŋ weɪv/
 [uncountable, countable]
(abbreviation LW)
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  1. a radio wave with a length of more than 1 000 metres; the band of radio waves at this length, used for broadcasting
    • on long wave to broadcast on long wave
    compare short waveTopics TV, radio and newsc2
See long wave in the Oxford Advanced American Dictionary
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