/ Dictionary / Index C Cassini: Meaning and Definition of Find definitions for: Cas•si•ni Pronunciation: (ku-sē'nē, kä-), [key] — n. (Oleg Cassini-Loiewski), born 1913, U.S. fashion designer and businessman, born in France. a walled plain in the first quadrant of the face of the moon: about 36 miles (56 km) in diameter. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Cassin Cassini division Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language