What is the meaning of twitching?

noun

• A sudden muscle spasm; especially one caused by a nervous condition.
  • synonyms: twitch, vellication

verb

• Make an uncontrolled, short, jerky motion.
  • usage: "his face is twitching"
  • synonyms: twitch, jerk
• Move with abrupt, seemingly uncontrolled motions.
  • usage: "The patient's legs were jerkings"
  • synonyms: jerk, twitch
• Toss with a sharp movement so as to cause to turn over in the air.
  • synonyms: flip, twitch
• Squeeze tightly between the fingers.
  • usage: "He pinched her behind"; "She squeezed the bottle"
  • synonyms: pinch, squeeze, twinge, tweet, nip, twitch
• Move or pull with a sudden motion.
  • synonyms: twitch