/ Dictionary / Index W water-fast: Meaning and Definition of Find definitions for: wa•ter-fast Pronunciation: (wô'tur-fast", -fäst", wot'ur-), [key] — adj. (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. waterfall water feather Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language