sub·in·feu·da·tion /ˌsʌbˌɪnfjuˈdeʃən/
  Sub·in·feu·da·tion n. Law (a) The granting of lands by inferior lords to their dependents, to be held by themselves by feudal tenure. --Craig. (b) Subordinate tenancy; undertenancy.
     The widow is immediate tenant to the heir, by a kind of subinfeudation, or undertenancy.   --Blackstone.
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