#1 convulsion n. [paroxysm, fit] a sudden uncontrollable attack; "a paroxysm of giggling"; "a fit of coughing"; "convulsions of laughter". wn
#2 convulsion n. violent uncontrollable contractions of muscles. wn
#3 convulsion n. [turmoil, upheaval] a violent disturbance; "the convulsions of the stock market". wn
#4 convulsion n. a physical disturbance such as an earthquake or upheaval. wn
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