<p><strong>Noun</strong></p><ul><li>Pathology. a sudden, abnormal, involuntary muscular contraction, consisting of a continued muscular contraction (tonic spasm) or of a series of alternating muscular contractions and relaxations (clonic spasm).</li><li>any sudden, brief spell of great energy, activity, feeling, etc.</li></ul><p><strong>Synonyms</strong></p><ul><li>spurt</li><li>flash</li><li>storm</li><li>fit</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to undergo a spasm or spasms: Her eyesight had changed, and tests showed the muscles that allow the eye to focus were spasming.</li></ul>