n. A channel or passage of water; a water-route; specifically, that part of a river, arm of the sea, or the like through which vessels enter or depart; the fairway.n. In ship-building, a name given to the thick planks at the outside of the deck, worked over the ends of the beams, and fitting against the inside of the top-timbers, to which, as well as to the ends of the beams, they are bolted, thus forming an important binding.