Definition of "countermand" []

• To cancel or reverse (a previously issued command or order). (verb-transitive)
• To recall by a contrary order: countermanded the air strikes. (verb-transitive)
• An order or command reversing another one. (noun)
• Cancellation of an order or command. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Those were the British orders, and the Japanese had no reason to countermand them on her say-so."
• "The Army had barred Donovan from going in with any of its contingents, no way a Navy admiral would countermand orders from a sister service and take a stowaway, Stark told him."
• "With Proposition 23, two out-of-state oil corporations, Valero and Tesoro, and right-wing oil billionaires based in New York and Kansas are trying to use the California initiative process, originally intended to allow citizen intervention in the governance of this state, to countermand AB 32 and set policy for us."