I. ˈkau̇n-tər-ˌmand, ˌkau̇n-tər-ˈ transitive verb
Etymology: Middle English countermaunden, from Anglo-French cuntremander, from cuntre- counter- + mander to command, from Latin mandare — more at mandate
Date: 15th century
1. : to revoke (a command) by a contrary order
2. : to recall or order back by a superseding contrary order
countermand reinforcements
II. ˈkau̇n-tər-ˌmand noun
Date: 1548
1. : a contrary order
2. : the revocation of an order or command