modulation in WordNet English dictionary

1. a manner of speaking in which the loudness or pitch or tone of the voice is modified
   modulation  inflection 
   
2. rise and fall of the voice pitch
   intonation  modulation  pitch contour 
   
3. the act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect)
   modulation 
   
4. (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase
   modulation 
   
5. a musical passage moving from one key to another
   transition  modulation