permanently housebound
(2) For purposes of paragraph (1) of this subsection, the requirement of “permanently housebound” shall be met when the surviving spouse is substantially confined to such surviving spouse’s house (ward or clinical areas, if institutionalized) or immediate premises by reason of a disability or disabilities reasonably certain to remain throughout such surviving spouse’s lifetime.
Source
38 USC § 1541(e)(2)
Scoping language
None identified, default scope is assumed to be this section only