'Spasm' definitions:

Definition of 'spasm'

From: WordNet
noun
A painful and involuntary muscular contraction [syn: spasm, cramp, muscle spasm]
noun
(pathology) sudden constriction of a hollow organ (as a blood vessel)

Definition of 'Spasm'

From: GCIDE
  • Spasm \Spasm\, n. [F. spasme, L. spasmus, Gr. ?, from ?, ?, to draw, to cause convulsion. Cf. Span, v. t.]
  • 1. (Med.) An involuntary and unnatural contraction of one or more muscles or muscular fibers. [1913 Webster]
  • Note: Spasm are usually either clonic or tonic. In clonic spasm, the muscles or muscular fibers contract and relax alternately in very quick succession. In tonic spasm, the contraction is steady and uniform, and continues for a comparatively long time, as in tetanus. [1913 Webster]
  • 2. A sudden, violent, and temporary effort or emotion; as, a spasm of repentance. [1913 Webster]
  • Cynic spasm (Med.) See under Cynic.
  • Spasm of the chest. See Angina pectoris, under Angina. [1913 Webster]

Synonyms of 'spasm'

From: Moby Thesaurus