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WordReference Random House Learner's Dictionary of American English © 2024fre•quen•cy mod•u•la•tion /ˈfrikwənsi mɑdʒəˌleɪʃən/USA pronunciation n. [uncountable]- Electronics, Radio and TelevisionSee FM.
WordReference Random House Unabridged Dictionary of American English © 2024fre′quency modula′tion, [Electronics, Radio.]- Electronics, Radio and TelevisionSee FM.
Collins Concise English Dictionary © HarperCollins Publishers:: frequency modulation n - a method of transmitting information using a radio-frequency carrier wave. The frequency of the carrier wave is varied in accordance with the amplitude and polarity of the input signal, the amplitude of the carrier remaining unchanged
Abbreviation: FM
Compare amplitude modulation
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