D defs.my
Entry 1 sense Webster, 1913

Mortmain

· Mort·main · IPA /ˈmɔɹt.meɪn/
01 n. Possession of lands or tenements in, or conveyance to, dead hands, or hands that cannot alienate.
  1. 1.
    Possession of lands or tenements in, or conveyance to, dead hands, or hands that cannot alienate.(Law)