As used in this part—

(1) “Executive agency” has the meaning given that term in section 105 of title 5;

(2) “uniformed services” has the meaning given that term in section 2101(3) of title 5;

(3) “competitive service” has the meaning given that term in section 2102 of title 5; and

(4) “United States”, when used in a geographic sense, means each of the several States and the District of Columbia.