Pertaining to a league or treaty; derived from an agreement or covenant between parties, especially between nations.

(US) A law-enforcement official of the FBI / (historical) A unionist soldier in the American Civil War. / A supporter of federation.

A system of national government in which power is divided between a central authority and a number of regions with delimited self-governing authority.

The unification of states to form a federal union. / The assumption of control or authority by a federal government.

plural of federal

In a federal manner.

(transitive) To unite into a federation. / (transitive) To bring under federal control. / (transitive) To change (a unitary state) into a federation.

plural of federalism

simple past tense and past participle of federalize

present participle of federalize