Obliteration

[L. obliteratio: cf. F. oblitération.]
The act of obliterating, or the state of being obliterated; extinction. Sir. M. Hale.

A destruction; an eradication of written words.

Obliteration is a method of revoking a will or a clause therein. Lines drawn through the signatures of witnesses to a will constitute an obliteration of the will even if the names are still decipherable.