Meaning of cosmological constant

cosmolog'ical con'stant

Pronunciation: [key]
— Astron. Astron.
  1. 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.