HURDLE, a movable fence, formed of a framework of light timber, wattled with smaller pieces of pliable wood, or constructed on the plan of a light five-barred gate, filled in with brushwood. Similar movable frames can be made of iron, wire or other ma terial. A construction of the same type is used in military engi neering and fortification as a foundation for a temporary roadway across boggy ground or as a backing for earthworks.