Federalism jẹ̀ ipọ́ ádalù tabi ọna kika ti ijọba, apapọ ijọba kan (ijọba aringbungbun tabi ijoba fèdira) pẹlu awọn ijoba agbegbe (agbegbe, ipinle, can, can, awọn agbegbe tabi awọnpo-ẹgbẹ miiran) ninu eto iṣakoso kan ṣoṣo.. 