When used in sections 10a, 10b, and 10c of this title -

(a)

The term ''United States'', when used in a geographical sense, includes the United States and any place subject to the jurisdiction thereof;

(b)

The terms ''public use'', ''public building'', and ''public work'' shall mean use by, public building of, and public work of, the United States, the District of Columbia, Puerto Rico, American Samoa, the Canal Zone, and the Virgin Islands