The Collaborative International Dictionary of English v.0.48:

Pound \Pound\, n. [AS. pund an inclosure: cf. forpyndan to turn
   away, or to repress, also Icel. pynda to extort, torment, Ir.
   pont, pond, pound. Cf. Pinder, Pinfold, Pin to inclose,
   Pond.]
   1. An inclosure, maintained by public authority, in which
      cattle or other animals are confined when taken in
      trespassing, or when going at large in violation of law; a
      pinfold. --Shak.
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   2. A level stretch in a canal between locks.
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   3. (Fishing) A kind of net, having a large inclosure with a
      narrow entrance into which fish are directed by wings
      spreading outward.
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   Pound covert, a pound that is close or covered over, as a
      shed.

   Pound overt, a pound that is open overhead.
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