spasm (sp?z??m)n.1. A sudden, involuntary contraction of a muscle or group of muscles.2. A sudden burst of energy, activity, or emotion.[Middle English spasme, from Old French, from Latin spasmus, from Greek spasmos, from sp?n, to pull.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.spasm (?spæz?m) n1. (Pathology) an involuntary muscular contraction, esp one resulting in cramp or convulsion2. a sudden burst of activity, emotion, etc[C14: from Latin spasmus, from Greek spasmos a cramp, from span to tear]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014spasm (?spæz ?m) n. 1. a sudden, abnormal, involuntary muscular contraction, consisting of a continued muscular contraction or of a series of alternating muscular contractions and relaxations. 2. any sudden, brief spell of great energy, activity, feeling, etc. [1350?1400;