The Collaborative International Dictionary of English v.0.48:
Disinherit \Dis`in*her"it\, v. t. [imp. & p. p. Disinherited;
p. pr. & vb. n. Disinheriting.] [Cf. Disherit,
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
2. To deprive of heritage; to dispossess.
And disinherit Chaos, that reigns here. --Milton.