Pronunciation: (di-stôr'shun),[key] —n. 1. an act or instance of distorting.
2. the state of being distorted or the relative degree or amount by which something is distorted or distorts.
3. anything that is distorted, as a sound, image, fact, etc.
4. Optics.an aberration of a lens or system of lenses in which the magnification of the object varies with the lateral distance from the axis of the lens. Cf. barrel distortion, pincushion distortion.