Search Result for "catchment": 
Wordnet 3.0

NOUN (1)

1. a structure in which water is collected (especially a natural drainage area); 



The Collaborative International Dictionary of English v.0.48:

Catchment \Catch"ment\, n.
   A surface of ground on which water may be caught and
   collected into a reservoir.
   [1913 Webster]


WordNet (r) 3.0 (2006):

catchment
    n 1: a structure in which water is collected (especially a
         natural drainage area)