| Noun | 1. | water supply - facility that provides a source of water; "the town debated the purification of the water supply"; "first you have to cut off the water"facility, installation - a building or place that provides a particular service or is used for a particular industry; "the assembly plant is an enormous facility" infrastructure, base - the stock of basic facilities and capital equipment needed for the functioning of a country or area; "the industrial base of Japan" water main - main (a pipe or conduit) for conveying water | |