actio pro socioglossary / actio pro socio (ak-shee-oh proh soh-shee-oh).Roman law. An action brought by one partner against another. Pl. actiones pro socio. See SOCIETAS. 词条贡献者 译者成昱,毕业于世界顶级翻译学院,擅长翻译各种与集体诉讼相关的法律文件。