/ Dictionary / Index E erst: Meaning and Definition of Find definitions for: erst Pronunciation: (ûrst), [key] — adv. Archaic. before the present time; formerly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: erst (Thesaurus) Erskine erstwhile Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language