Cite
 

Meaning of water-fast

wa•ter-fast

Pronunciation: (wô'tur-fast", -fäst", wot'ur-), [key]
— adj.
  1. (of a color or dye) resistant to the effects caused by water; not changed or faded by the action of water.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.