Word.ws English Dictionary

casus bellis

casus bellis is the plural of casus belli.

Meaning of casus belli

Noun

casus belli (plural casus belli or casus bellis)

  1. An act seen as justifying or causing a war; an act of war.
    • In ancient times, repeatedly failing to pay tribute by a vassal state was often used as a casus belli by the patron.

Questions about casus bellis

What is casus bellis the plural of?
Casus bellis is the plural of casus belli.

Words near casus bellis in the dictionary

  1. casulae
  2. Casumbazar
  3. Casuntingan
  4. casus
  5. casus belli
  6. casus bellis
  7. casus foederis
  8. casus fortuitus
  9. casus omissus
  10. casus recti
  11. casus rectus

Source and license

Adapted from Wiktionary: casus bellis (page history and authors); casus belli (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “casus bellis.” Word.ws, https://word.ws/casus_bellis. Based on Wiktionary, CC BY-SA 4.0.