To contract violently and irregulary, as the muscular parts of an animal body; to shake with irregular spasms, as in excessive laughter, or in agony from grief or pain.
- To shake or agitate violently: tremors that convulsed the countryside; when civil war convulsed the nation. See Synonyms at agitate.
- To affect with irregular and involuntary muscular contractions; throw into convulsions.
- To cause to shake with laughter or strong emotion.
- To become affected by or as if by convulsions; shake.