/ Dictionary / Index C cosmological principle: Meaning and Definition of Find definitions for: cosmolog'ical prin"ciple Pronunciation: [key] — Astron. Astron. the hypothesis that the universe is isotropic and homogeneous on a large scale: used to simplify the equations of general relativity for models of the universe. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cosmological constant cosmological redshift Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language