Meaning of modulate

Definition of modulate

(verb) change the key of, in music; "modulate the melody"
vary the pitch of one's speech
fix or adjust the time, amount, degree, or rate of; "regulate the temperature"; "modulate the pitch"
adjust the pitch, tone, or volume of
vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)

Other information on modulate

WIKIPEDIA results for modulate
Amazon results for modulate