Nautical. The direction in which, or point of the compass towards which, a ship sails. Hence transferred of the direction or line pursued by an…

(see quot. 1919); the planned course of an aircraft or space vehicle from point to point; also transferred.

Originally Nautical. The direction in which something (as a ship, aeroplane, compass, etc.) is pointing or moving, typically expressed relative to a…

Aeronautics. The projection on the earth's surface of the (actual or intended) course of an aircraft; the representation of this on a chart.

Aeronautics. A course to be taken by an aircraft, or steered by a pilot.