Source : Webster's Revised Unabridged Dictionary (1913)

Disinherit \Dis`in*her"it\, v. t. [imp. & p. p. {Disinherited};
   p. pr. & vb. n. {Disinheriting}.] [Cf. {Disherit},
   {Disheir}.]
   1. To cut off from an inheritance or from hereditary
      succession; to prevent, as an heir, from coming into
      possession of any property or right, which, by law or
      custom, would devolve on him in the course of descent.

            Of how fair a portion Adam disinherited his whole
            posterity!                            --South.

   2. To deprive of heritage; to dispossess.

            And disinherit Chaos, that reigns here. --Milton.