Definitions of modulation:

  • noun:   the act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect)
  • noun:   (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase
  • noun:   a manner of speaking in which the loudness or pitch or tone of the voice is modified
  • noun:   rise and fall of the voice pitch
  • noun:   a musical passage moving from one key to another