/ Dictionary / Index L Lateran Council: Meaning and Definition of Find definitions for: La'teran Coun'cil Pronunciation: [key] — Rom. Cath. Ch. Rom. Cath. Ch. any of the five ecumenical councils (1123, 1139, 1179, 1215, 1512–17) held in the Lateran Palace. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lateran Lateran Palace Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language