/ Dictionary / Index C Cathar: Meaning and Definition of Find definitions for: Cath•ar Pronunciation: (kath'är), [key] — pl. -a•ri -ars. (in medieval Europe) a member of any of several rigorously ascetic Christian sects maintaining a dualistic theology. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cath- catharine wheel Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language