distortion in WordNet English dictionary

1. an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
   aberration  distortion  optical aberration 
   
2. a change for the worse
   distortion  deformation 
   
3. a shape resulting from distortion
   distorted shape  distortion 
   
4. the act of distorting something so it seems to mean something it was not intended to mean
   distortion  overrefinement  straining  torture  twisting 
   
5. the mistake of misrepresenting the facts
   distortion 
   
6. a change (usually undesired) in the waveform of an acoustic or analog electrical signal; the difference between two measurements of a signal (as between the input and output signal)
   "heavy metal guitar players use vacuum tube amplifiers to produce extreme distortion"
   distortion