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Definition of FM abbreviation from the Oxford Advanced Learner's Dictionary

  1.  
    /ˌef ˈem/
     
    /ˌef ˈem/
    frequency modulation
    (a method of broadcasting high-quality sound by radio)
    • Radio 1 FM
    Topics TV, radio and newsc1
  2. (in writing) field marshal
See FM in the Oxford Advanced American Dictionary

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