/ Dictionary / Index E Einstein shift: Meaning and Definition of Find definitions for: Ein'stein shift' Pronunciation: [key] — Physics, Astron. Physics,Astron. formerly, gravitational redshift. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Einstein's equivalency principle Einstein's photoelectric equation Related Content Daily Word Quiz: cosmology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language