English edit

 
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Etymology edit

From Latin casus (case) + foederis, genitive of foedus (treaty).

Pronunciation edit

  • (UK) IPA(key): /ˌkeɪ.səs ˈfiː.də.ɹɪs/

Noun edit

casus foederis

  1. A situation covered by the terms of an international treaty (or similar understanding), and which consequently requires action from the parties involved.