/ Dictionary / Index E eury-: Meaning and Definition of Find definitions for: eury- Pronunciation: [key] a combining form meaning “broad,” “wide,” used in the formation of compound words: eurypterid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Eurus Eurybates Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language