The term REVOKE LEGALLY can be summarized as the act of annulling or cancelling a legal document or decision. ANNUL is a verb meaning to declare something legally invalid or void, and it is often used in reference to marriage or other contracts. Annulment is the process of legally ending a marriage or other contract, and it is usually done when one or both parties have not fulfilled their obligations. Annulment is different from divorce in that it does not require a court hearing or any other legal proceedings.