n. 1. (Naut.) See Drag, n., 6, and Drag sail, under Drag, n. [ 1913 Webster ]
2. a small parachute dragged behind a vehicle as a means of stabilizing it, or deployed first so as to assist opening of a larger parachute. [ PJC ]
3. a funnel-shaped attachment at the end of a hose suspended from a tanker airplane in flight, to which the probe of another airplane may connect, so as to complete a connecting hose line through which fuel may be transferred from the tanker to the following airplane. It is used for in-flight refueling. [ PJC ]