Emily Dickinson Lexicon

SUB-IN-FEU-DA'TION, n. [sub and infeudation. See Feud.]

1. In law, the act of enfeoffing by a tenant or feofee, who holds lands of the crown; the act of a greater baron, who grants land or a smaller manor to an inferior person. By 34 Edward III. all subinfeudations previous to the reign of king Edward I. were confirmed. – Blackstone.
2. Under tenancy. The widow is immediate tenant to the heir, by a kind of subinfeudation or under tenancy. – Blackstone.