The term "interstate commerce", as used in this title, includes commerce between one State, Territory, Possession, or the District of Columbia and another State, Territory, Possession, or the District of Columbia.
The term "foreign commerce", as used in this title, includes commerce with a foreign country.
18 U.S.C. § 10
HISTORICAL AND REVISION NOTES Based on title 18, U.S.C., 1940 ed., §§408, 408b, 414(a), and 419a(b) (Oct. 29, 1919, ch. 89, §2(b), 41 Stat. 325; June 22, 1932, ch. 271, §2, 47 Stat. 326; May 18, 1934, ch. 301, 48 Stat. 782; May 22, 1934, ch. 333, §2(a), 48 Stat. 794; Aug. 18, 1941, ch. 366, §2(b), 55 Stat. 631). This section consolidates into one section identical definitions contained in sections 408, 408b, 414(a), and 419a(b) of title 18, U.S.C., 1940 ed.In addition to slight improvements in style, the word "commerce" was substituted for "transportation" in order to avoid the narrower connotation of the word "transportation" since "commerce" obviously includes more than "transportation." The word "Possession" was inserted in two places to make the definition more accurate and comprehensive since the places included in the word "Possession" would normally be within the term defined and a narrower construction should be handled by express statutory exclusion in those crimes which Congress intends to restrict to commerce within the continental United States.