/ Dictionary / Index H headwaters: Meaning and Definition of Find definitions for: head•wa•ters Pronunciation: (hed'wô"turz, -wot"urz), [key] — n.pl. the upper tributaries of a river. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: headwaters (Thesaurus) headwaiter headway Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language