countermure noun. ['kaʊntǝmjʊǝ] E16.
[Old & mod. French contremur, formed as COUNTER- + mur wall.]
1. A defensive wall raised inside another wall, in case of a breach in the latter. E16.

2. An outer wall round a city. M16.

3. A wall or mound raised outside a fortress to help besiegers. M16.

4. fig. A strong defence. L16.

[TahlilGaran] English Dictionary ▲

countermure verb trans. ['kaʊntǝmjʊǝ] LME.
[French contremurer, formed as COUNTERMURE noun.]
Defend with a countermure.

[TahlilGaran] English Dictionary ▲