/ Dictionary / Index C catholicos: Meaning and Definition of Find definitions for: ca•thol•i•cos Pronunciation: (ku-thol'i-kus, -kos"), [key] — pl. -cos•es, -coi (often cap.) any of the heads of certain autocephalous churches. (in some autocephalous churches) a primate subject to a patriarch and having authority over metropolitans. (in the early Christian church) the head of monasteries in the same city. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: catholicos (Thesaurus) catholicon catholicus Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language