n. The act of twisting or wrenching, or the state of being twisted or wrenched; specifically, the act of writhing, especially spasmodically; a twist; wry motion; distortion: as, the contortion of the muscles of the face.n. In surgery, a twisting or wresting of a limb or member of the body out of its natural situation; partial dislocation.n. In vegetable teratol., an irregular twisting or bending of the stems or branches of plants, due to various causes, usually accidental.n. In geology, the disordered attitude of irregularly folded stratified rocks.