/ Dictionary / Index E ecumenicist: Meaning and Definition of Find definitions for: ec•u•men•i•cist Pronunciation: (ek"yoo-men'u-sist or, esp. Brit., ē"kyoo-), [key] — n. a person who advocates Christian ecumenicity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ecumenicism ecumenicity Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language