#1 distortion n. [deformation] a change for the worse. wn
#2 distortion n. [distorted shape] a shape resulting from distortion. wn
#3 distortion n. [aberration, optical aberration] an optical phenomenon resulting from the failure of a lens or mirror to produce a good image. wn
#4 distortion n. 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 extrem. wn
#5 distortion n. [overrefinement, straining, torture, twisting] the act of distorting something so it seems to mean something it was not intended to mean. wn
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