countermure

noun
coun·​ter·​mure | \ ˈkau̇ntə(r)+ˌ-\

Definition of countermure

 (Entry 1 of 2)

1 : a second or supplementary wall : a wall raised behind another that might be breached
2 : a wall raised by besiegers confronting a defense wall

countermure

transitive verb
-ed/-ing/-s

Definition of countermure (Entry 2 of 2)

: to protect or fortify with a countermure

History and Etymology for countermure

Noun

alteration of earlier contremeur, from Middle French contremur, from contre- counter- + mur wall

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