/ Dictionary / Index C cosmological constant: Meaning and Definition of Find definitions for: cosmolog'ical con'stant Pronunciation: [key] — Astron. Astron. a term introduced by Einstein into his field equations of general relativity to permit a stationary, nonexpanding universe: it has since been abandoned in most models of the universe. Cf. Einstein model. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cosmological argument cosmological principle 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