Con‐vul″sion (?), n. [L. convulsio: cf. F. convulsion.] 1. (Med.) An unnatural, violent, and unvoluntary contraction of the muscular parts of an animal body.
2. Any violent and irregular motion or agitation; a violent shaking; a tumult; a commotion.
Those two massy pillars,
With horrible convulsion, to and fro
He tugged, he shook, till down they came.
Milton.
Times of violence and convulsion.
Ames.
Syn. — Agitation; commotion; tumult; disturbance.