[1] : The Collaborative International Dictionary of English v.0.48

disinherit \dis`inher"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.
      1913 webster

            of how fair a portion adam disinherited his whole
            posterity                            --south.
      1913 webster

   2. to deprive of heritage; to dispossess.
      1913 webster

            and disinherit chaos, that reigns here. --milton.
      1913 webster
see also:
disinherited disinheriting disherit disheir 

[2] : WordNet (r) 2.0

disinherit
     v : prevent deliberately as by making a will from inheriting
         syn: disown ant: bequeath
see also:
disown bequeath 

Disinherit >> D Words
Disinherit, definition of term: Disinherit
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