to be agitated with quick, short motions continually repeated; to shake with fear, cold, etc.; to shudder; to tremble.-to shake, vibrate, or quiver, either from not being solid, as soft, wet land, or from violent convulsion of any kind; as, the earth quakes; the mountains quake.-to cause to quake.-a tremulous agitation; a quick vibratory movement; a shudder; a quivering.