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1. (music) change the key of, in music
   "modulate the melody"
    
2. Vary the pitch of one's speech
   - tone, inflect
    
3. Fix or adjust the time, amount, degree, or rate of
   "modulate the pitch";
   - regulate
    
4. Adjust the pitch, tone, or volume of
    
5. Vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)

Derived forms: modulates, modulating, modulated

Type of: adjust, alter, change, correct, mouth, play, set, speak, spiel, talk, utter, vary, verbalise [Brit], verbalize

Encyclopedia: Modulate