Definition of: twitch

(twich) v.t.
1. To pull sharply; pluck with a jerky movement.
2. In lumbering, to drag or skid (logs) along the ground with a chain.
—v.i.
3. To tug or move with a quick, spasmodic jerk, as a muscle.
—noun
1. A sudden involuntary contraction of a muscle.
2. A sudden jerk or pull. [ME twicchen. Akin to OE twiccian pluck.]
—twitch′ing·ly adverb