5. To move smoothly through the air; to glide through the air without
apparent exertion, as a bird.
As is a winged messenger of heaven, . . . When he bestrides the
lazy pacing clouds, And sails upon the bosom of the air.
Shak.
Sail, v. t. 1. To pass or move upon, as in a ship, by means of sails;
hence, to move or journey upon (the water) by means of steam or other
force.
A thousand ships were manned to sail the sea.
Dryden.