/pond/ , n.
1. a body of water smaller than a lake, sometimes artificially formed, as by damming a stream.
v.i.
2. (esp. of water) to collect into a pond or large puddle: to prevent rainwater from ponding on the roof.
[ 1250-1300; ME ponde, pande, akin to OE pynding dam, gepyndan to impound. See POUND 3 ]