countermand Definition

countermand
verb countermanded, countermanding

1. To cancel or revoke (an order or command).

Thesaurus: annul, reverse, repeal, cancel, abrogate, override, rescind, revoke.
2. To recall (a person, troops, etc).

noun

1. A command which cancels a previous one.

Etymology: 15c: from French contremander, from Latin mandare to order.