Con-vŭl'sion, n.

n. [Lat. convulsio, Fr. & Sp. convulsion, It. convulsione.] 1. (Med.) An unnatural, violent, and involuntary contraction of the muscular parts of an animal body. This is convulsion, and no healthful life. Byron. 2. Any violent and irregular motion or agitation; hence, a tumult; commotion. “Times of violence and convulsion.” Fisher Ames. Those two massy pillars, With horrible convulsion, to and fro He tugged, he shook, till down they came. Milton. Syn.—Agitation; commotion; tumult; disturbance.