<p><strong>Noun</strong></p><ul><li>a sudden, involuntary, spasmodic contraction of a muscle or group of muscles, especially of the extremities, sometimes with severe pain.</li><li>a piercing pain in the abdomen.</li><li>an intermittent, painful contraction of structures of a wall containing involuntary muscle, as in biliary colic or in the uterine contractions of menstruation or of labor.</li><li>writer's cramp.</li></ul><p><strong>Verb</strong></p><ul><li>to affect with or as if with a cramp.</li></ul>