The Collaborative International Dictionary of English v.0.48:

Eat \Eat\, v. i.
   1. To take food; to feed; especially, to take solid, in
      distinction from liquid, food; to board.
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            He did eat continually at the king's table. --2 Sam.
                                                  ix. 13.
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   2. To taste or relish; as, it eats like tender beef.
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   3. To make one's way slowly.
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   To eat, To eat in or To eat into, to make way by
      corrosion; to gnaw; to consume. "A sword laid by, which
      eats into itself." --Byron.

   To eat to windward (Naut.), to keep the course when
      closehauled with but little steering; -- said of a vessel.
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