convulsion - definition and synonyms

noun [countable] [usually plural] 

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/kənˈvʌlʃ(ə)n/
singularconvulsion
pluralconvulsions
  1.   From our crowdsourced Open Dictionary
    3
    be in convulsions to be laughing a lot, especially in a way that you cannot controlSubmitted by Caleb Judy from United States on 04/01/2016