/ Dictionary / Index C cassation: Meaning and Definition of Find definitions for: cas•sa•tion Pronunciation: (ka-sā'shun, ku-), [key] — n. annulment; cancellation; reversal. an 18th-century instrumental suite for outdoor performance, similar to the divertimento and the serenade. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cassareep Cassatt 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