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English definition of “convulsion”

convulsion

noun [C usually plural]     /kənˈvʌl.ʃən/
a sudden movement of the muscles in your body that you cannot control, caused by illness or drugs: She went into convulsions and had to be rushed to hospital.Making short, sudden movements
(Definition of convulsion noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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