/ Dictionary / Index C casus belli: Meaning and Definition of Find definitions for: ca•sus bel•li Pronunciation: (kā'sus bel'ī, bel'ē Lat. kä's&oobreves bel'lē), [key] — pl. ca•sus bel•li an event or political occurrence that brings about a declaration of war. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. casuistry cat Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language