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Gianluca,毕业于亚洲顶尖的高级翻译学院,专注翻译各种与清洁与可再生能源有关的法律文件。