the departure of a ship from port: The cruise line offers sailings every other day.
Navigation. any of various methods for determining courses and distances by means of charts or with reference to longitudes and latitudes, rhumb lines, great circles, etc.
an area of canvas or other fabric extended to the wind in such a way as to transmit the force of the wind to an assemblage of spars and rigging mounted firmly on a hull, raft, iceboat, etc., so as to drive it along.
some similar piece or apparatus, as the part of an arm that catches the wind on a windmill.