/ Dictionary / Index C cloistress: Meaning and Definition of Find definitions for: clois•tress Pronunciation: (kloi'stris), [key] — n. Obs. a nun. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cloistral cloky Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language