IREVOCABLE. That which cannot be revoked.

2. A will may at all times be revoked by the same person who made it, he having a disposing mind; but the moment the testator is rendered incapable to make a will he can no longer revoke a former will, because he wants a disposing mind. Letters of attorney are generally revocable; but when made for a valuable consideration they become irrevocable. 7 Ves. jr. 28; 1 Caines' Cas. in Er. 16; Bac. Ab. Authority, E. Vide duthority; License; Revocation.