[n] any federal law-enforcement officer
[n] a member of the Union Army during the American Civil War
[adj] national; especially in reference to the government of the United States as distinct from that of its member units; "the Federal Bureau of Investigation"; "federal courts"; "the federal highway program"; "federal property"
[adj] (government) characterized by or constituting a form of government in which power is divided between one central and several regional authorities; "a federal system like that of the United States"; "federal governments often evolved out of confederatons"
[adj] being of or having to do with the northern United States and those loyal to the Union during the Civil War; "Union soldiers"; "Federal forces"; "a Federal infantryman"
[adj] of or relating to the central government of a federation; "a federal district is one set aside as the seat of the national government"