The city official had to invoke support from the fire department in order to carry out the order to revoke the parade permit. In the end, he also had to evoke an order from the mayor to cancel the parade.
Lucinda tried to invoke the help of a magician to complete her overdue homework assignment; however, she had to revoke her appeal when her teacher said she would get a lower grade if she had outside help.
James was allowed to use Marie's cell phone, but she revoked this privilege when he started to use it to show his friends her private e-mails.2. To cancel an act, particularly a statement, document, or promise as if it no longer exists: A person can revoke a will or an offer to enter into a contract, while a government agency can officially declare that something is no longer legal.