/ Dictionary / Index H high water: Meaning and Definition of Find definitions for: high' wa'ter Pronunciation: [key] water at its greatest elevation, as in a river. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: highwater (Thesaurus) highwall high-water mark Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language