- water, obtained directly from a faucet or tap, that has not been purified, distilled, or otherwise treated.
Origin of tap water
First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tap water
Our own experiments have been made both with distilled water and tap-water with the advantage in favor of the latter.The North American Slime-Moulds
Thomas H. (Thomas Huston) MacBride
The cell is usually filled with tap-water, and a period of rest after making up, generally speaking, improves the sensitiveness.Response in the Living and Non-Living
Jagadis Chunder Bose
Thus, a shallow tin vessel, such as the lid of a biscuit box, may be levelled and filled with tap-water through a rubber hose.
- water drawn off through taps from pipes in a house, as distinguished from distilled water, mineral water, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012