1. vary the pitch of one's speech

    Synonyms : inflect, tone
    Type Of : utter, verbalise, mouth, verbalize, speak, talk
  2. fix or adjust the time, amount, degree, or rate of

    Synonyms : regulate
    Type Of : set, adjust, correct
    Examples :
    • modulate the pitch
  3. adjust the pitch, tone, or volume of

    Type Of : correct, set, adjust
  4. change the key of, in music

    Type Of : play, spiel
    Examples :
    • modulate the melody
  5. vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)

    Type Of : vary, change, alter