an appearance that has been spoiled or is misshapen; "there were distinguishing disfigurements on the suspect's back"; "suffering from facial disfiguration"
the act of distorting something so it seems to mean something it was not intended to mean
a change for the worse
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"