/ Dictionary / Index H hypersphere: Meaning and Definition of Find definitions for: hy•per•sphere Pronunciation: (hī'pur-sfēr", hī"pur-sfēr'), [key] — n. Math. the generalization of a sphere to more than three dimensions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hyperspace hypersplenism Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language