/ Dictionary / Index H hydrograph: Meaning and Definition of Find definitions for: hy•dro•graph Pronunciation: (hī'dru-graf", -gräf"), [key] — n. a graph of the water level or rate of flow of a body of water as a function of time, showing the seasonal change. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrogeology hydrography Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language