38 USC 3002 - Definitions
For the purposes of this chapter
(1) The term basic educational assistance means educational assistance provided under subchapter II of this chapter.
(2) The term supplemental educational assistance means educational assistance provided under subchapter III of this chapter.
(3) The term program of education
(B) includes
(i) a preparatory course for a test that is required or used for admission to an institution of higher education; and
(ii) a preparatory course for a test that is required or used for admission to a graduate school; and
(4) The term Selected Reserve means the Selected Reserve of the Ready Reserve of any of the reserve components (including the Army National Guard of the United States and the Air National Guard of the United States) of the Armed Forces, as required to be maintained under section 10143 (a) of title 10.
(5) The term Secretary of Defense means the Secretary of Defense, except that it means the Secretary of Homeland Security with respect to the Coast Guard when it is not operating as a service in the Navy.
(6) The term active duty does not include any period during which an individual
(A) was assigned full time by the Armed Forces to a civilian institution for a course of education which was substantially the same as established courses offered to civilians,
(B) served as a cadet or midshipman at one of the service academies, or
(7) The term active duty includes full-time National Guard duty first performed after June 30, 1985, by a member of the Army National Guard of the United States or the Air National Guard of the United States in the members status as a member of the National Guard of a State for the purpose of organizing, administering, recruiting, instructing, or training the National Guard.