'Disinherit' definitions:

Definition of 'disinherit'

verb

Prevent deliberately (as by making a will) from inheriting [syn: disinherit, disown] [ant: bequeath, leave, will]

From: GCIDE

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. [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]