/ Dictionary / Index W water feather: Meaning and Definition of Find definitions for: wa'ter feath"er Pronunciation: [key] a water milfoil, Myriophyllum aquaticum. a North American featherfoil, Hottonia inflata. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. water-fast waterfinder Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language