act of hostilityglossary / act of hostility act of hostility. An event that may be considered an adequate cause for war; CASUS BELLI. — Also termed hostile act. 词条贡献者 资深译员Lester,毕业于美国一流的高级翻译学院,专注翻译各种与复杂国际仲裁有关的法律文件。