Dictionary definition · twitch
noun
- a sudden muscle spasm; especially one caused by a nervous condition
verb
- make an uncontrolled, short, jerky motion"his face is twitching"
- move with abrupt, seemingly uncontrolled motions"The patient's legs were jerking"
- toss with a sharp movement so as to cause to turn over in the air
- squeeze tightly between the fingers"He pinched her behind"
- move or pull with a sudden motion
Source: Open English WordNet (CC BY 4.0).