The Collaborative International Dictionary of English v.0.48:

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.
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   2. To move through or on the water; to swim, as a fish or a
      water fowl.
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   3. To be conveyed in a vessel on water; to pass by water; as,
      they sailed from London to Canton.
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   4. To set sail; to begin a voyage.
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   5. To move smoothly through the air; to glide through the air
      without apparent exertion, as a bird.
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            As is a winged messenger of heaven, . . .
            When he bestrides the lazy pacing clouds,
            And sails upon the bosom of the air.  --Shak.
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