What is the meaning of convulse?

verb

• Make someone convulse with laughter.
  • usage: "The comedian convulsed the crowd"
• Be overcome with laughter.
• Move or stir about violently.
  • usage: "The feverish patient thrashed around in his bed"
  • synonyms: thresh, thresh about, thrash, thrash about, slash, toss, jactitate
• Shake uncontrollably.
  • usage: "earthquakes convulsed the countryside"
• Cause to contract.
  • usage: "The spasm convulses her facial muscles"
• Contract involuntarily, as in a spasm.
  • usage: "The muscles in her face convulsed"