/ Dictionary / Index C Copernican: Meaning and Definition of Find definitions for: Co•per•ni•can Pronunciation: (kō-pûr'ni-kun, ku-), [key] — adj. of or pertaining to Copernicus or his theories. important and radically different; thoroughgoing: a Copernican revolution in modern art. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: copernican (Thesaurus) coper Copernicus Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language