/ Dictionary / Index C cislunar: Meaning and Definition of Find definitions for: cis•lu•nar Pronunciation: (sis-l'nur), [key] — adj. Astron. of or pertaining to the space between the earth and the orbit of the moon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cislunar (Thesaurus) Ciskei cismontane Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language