kənˈvʌls ˈdʒaktɪteɪt θɹæʃ θɹɛʃ tɒs tɔs be overcome with laughter make someone convulse with laughter The comedian convulsed the crowd contract involuntarily, as in a spasm The muscles in her face convulsed cause to contract The spasm convulses her facial muscles shake uncontrollably earthquakes convulsed the countryside move or stir about violently The feverish patient thrashed around in his bed