- 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 ).
- any sudden, brief spell of great energy, activity, feeling, etc.
- to undergo a spasm or spasms: Her eyesight had changed, and tests showed the muscles that allow the eye to focus were spasming.
- an involuntary muscular contraction, esp one resulting in cramp or convulsion
- a sudden burst of activity, emotion, etc
