/ Dictionary / Index H Hipparchus: Meaning and Definition of Find definitions for: Hip•par•chus Pronunciation: (hi-pär'kus), [key] — n. died 514 b.c., tyrant of Athens 527–514. c190–c125 b.c., Greek astronomer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hipparchus (Thesaurus) hipp- hipped Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language