ACTIO Meaning of ACTIO in English ˈakshēˌō, ˈäktēˌō noun( plural acti·o·nes ˌakshēˈōˌnēz, ˌäktēˈōˌnās)Etymology: LatinRoman law : an action or right of action — see formula 5 Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012