/ Dictionary / Index C copen: Meaning and Definition of Find definitions for: co•pen Pronunciation: (kō'pun), [key] — n. Also calleda medium blue color. —adj. of the color copen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. copemate Copenhagen Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language