North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
characterized by or constituting a form of government in which power is held by one central authority; "a unitary as opposed to a federal form of government"
of or pertaining to or involving the use of units; "a unitary method was applied"; "established a unitary distance on which to base subsequent calculations"
relating to or characterized by or aiming toward unity; "the unitary principles of nationalism"; "a unitary movement in politics"