Main entry: convulsion
Definition: a physical disturbance such as an earthquake or upheaval
Main entry: upheaval, turmoil, convulsion
Definition: a violent disturbance
Usage: the convulsions of the stock market
Main entry: convulsion
Definition: violent uncontrollable contractions of muscles
Main entry: convulsion, paroxysm, fit
Definition: a sudden uncontrollable attack
Usage: a paroxysm of giggling; a fit of coughing; convulsions of laughter