/ Dictionary / Index E ETI: Meaning and Definition of Find definitions for: ETI Pronunciation: [key] extraterrestrial intelligence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ethynyl group etic Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language