The navigable part of a river, bay, etc., through which vessels enter or depart; the part of a harbor or channel ehich is kept open and unobstructed for the passage of vessels.
- A stretch of ground free of obstacles to movement.
- Sports The part of a golf course covered with short grass and extending from the tee to the putting green.
- Nautical A navigable deep-water channel in a river or harbor or along a coastline.
- Nautical The usual course taken by vessels through a harbor or coastal waters.