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,
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
2. A level stretch in a canal between locks.
3. (Fishing) A kind of net, having a large inclosure with a
narrow entrance into which fish are directed by wings
Pound covert, a pound that is close or covered over, as a
Pound overt, a pound that is open overhead.