/ Dictionary / Index C circumstellar: Meaning and Definition of Find definitions for: cir•cum•stel•lar Pronunciation: (sûr"kum-stel'ur), [key] — adj. surrounding a star. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. circumstantiate circumterrestrial Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language