/ Dictionary / Index S secular tertiaries: Meaning and Definition of Find definitions for: sec'ular ter'tiaries. Pronunciation: [key] See under(def. 5). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. secularize secular vicar Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language