<p><strong>Verb (used with object)</strong></p><ul><li>to tug or pull at with a quick, short movement; pluck: She twitched him by the sleeve.</li><li>to jerk rapidly: The rider twitched the reins a couple of times.</li><li>to move (a part of the body) with a sudden, jerking motion.</li><li>to pinch or pull at sharply and painfully; give a smarting pinch to; nip.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to move spasmodically or convulsively; jerk; jump.</li><li>to give a sharp, sudden pull; tug; pluck (usually followed by at): He constantly twitched at his collar.</li><li>to ache or hurt with a sharp, shooting pain; twinge: That back tooth twitches a bit.</li></ul><p><strong>Noun</strong></p><ul><li>a quick, jerky movement of the body or of some part of it.</li><li>involuntary, spasmodic movement of a muscle; tic: He gets a twitch in his left eye when he's nervous.</li><li>a short, sudden pull or tug; jerk.</li><li>a bodily or mental twinge, as of pain, conscience, etc.; pang.</li><li>a loop or noose placed over the muzzle of a horse and tightened by twisting a stick or handle to which it is attached, used as a restraining device during a painful operation.</li></ul>