/ Dictionary / Index S spasm: Meaning and Definition of Find definitions for: spasm Pronunciation: (spaz'um), [key] — n. a sudden, abnormal, involuntary muscular contraction, consisting of a continued muscular contractionor of a series of alternating muscular contractions and relaxations any sudden, brief spell of great energy, activity, feeling, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spasm (Thesaurus) sparver spasm band Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language