/ Dictionary / Index H hydrosphere: Meaning and Definition of Find definitions for: hy•dro•sphere Pronunciation: (hī'dru-sfēr"), [key] — n. the water on or surrounding the surface of the globe, including the water of the oceans and the water in the atmosphere. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hydrosphere (Thesaurus) hydrosome hydrostat Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language