/ Dictionary / Index P Prospect Heights: Meaning and Definition of Find definitions for: Pros'pect Heights' Pronunciation: [key] a town in N Illinois. 11,808. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prospect prospective Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language