'Water supply' definitions:

Definition of 'water supply'

From: WordNet
noun
A facility that provides a source of water; "the town debated the purification of the water supply"; "first you have to cut off the water" [syn: water system, water supply, water]

Definition of 'Water supply'

From: GCIDE
  • Water supply \Wa"ter sup*ply"\ A supply of water; specifically, water collected, as in reservoirs, and conveyed, as by pipes, for use in a city, mill, or the like. [1913 Webster]