spasm > define
noun
- A painful and involuntary muscular contraction.
- synonyms: cramp, muscle spasm
- Pathology) sudden constriction of a hollow organ (as a blood vessel. ().
by WordNet 3.0 © 2006 by Princeton University
- (v.t.) A sudden, violent, and temporary effort or emotion; as, a spasm of repentance.
- (v.t.) An involuntary and unnatural contraction of one or more muscles or muscular fibers.
by Webster's Revised Unabridged Dictionary