/ Dictionary / Index E EIS: Meaning and Definition of Find definitions for: EIS Pronunciation: [key] Environmental Impact Statement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. eirenic eisegesis 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