/ Dictionary / Index E ex cathedra: Meaning and Definition of Find definitions for: ex ca•the•dra Pronunciation: (eks' ku-thē'dru, kath'i-dru), [key] from the seat of authority; with authority: used esp. of those pronouncements of the pope that are considered infallible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. excardination excaudate Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language