Source : Webster's Revised Unabridged Dictionary (1913)

Sail \Sail\, v. i. [imp. & p. p. {Sailed}; p. pr. & vb. n.
   {Sailing}.] [AS. segelian, seglian. See {Sail}, n.]
   1. To be impelled or driven forward by the action of wind
      upon sails, as a ship on water; to be impelled on a body
      of water by the action of steam or other power.

   2. To move through or on the water; to swim, as a fish or a
      water fowl.

   3. To be conveyed in a vessel on water; to pass by water; as,
      they sailed from London to Canton.

   4. To set sail; to begin a voyage.

   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.