/ Dictionary / Index E EIR: Meaning and Definition of Find definitions for: EIR Pronunciation: [key] Environmental Impact Report. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Einthoven Eire Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language