1. A twisting, or turning, motion of a solid item around its axis of symmetry, produced by the application of opposing forces or torques at opposite ends of something: The decorative wrought iron railing on Mary's balcony was created by exerting torsions at both ends of the rod of metal.
2. The twisting of any part that is free to move in the body: The intestines can experience torsion which may cause obstructions of the blood supply to the affected organ and pain is usually the first symptom.

If the torsion is not corrected for the part, there can be a development of tissue death and infection.

A device designed to measure weak gravitational, electrostatic, or magnetic forces by determining the amount of torsion that they cause in a wire or filament.