/ Dictionary / Index E ERT: Meaning and Definition of Find definitions for: ERT Pronunciation: [key] estrogen replacement therapy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ert (Thesaurus) erstwhile Ertebølle Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language