Available Definitions:
1) a. - Pertaining to a league or treaty; derived from an agreement or covenant between parties, especially between nations; constituted by a compact between parties, usually governments or their representatives.
2) a. - Composed of states or districts which retain only a subordinate and limited sovereignty, as the Union of the United States, or the Sonderbund of Switzerland.
3) a. - Consisting or pertaining to such a government; as, the Federal Constitution; a Federal officer.
4) a. - Friendly or devoted to such a government; as, the Federal party. see Federalist.
5) n. - See Federalist .