
• (n.) A wall raised behind another, to supply its place when breached or destroyed. [R.] Cf. Contramure. • (v. t.) To fortify with a wall behind another wall.
Found on
http://thinkexist.com/dictionary/meaning/countermure/
Coun'ter·mure` noun [
Counter- +
mure : confer French
contremur .]
(Fort.) A wall raised behind another, to supply its place when breached or destroyed. [ R.] Confer
Contramure .
Knolles. Found on
http://www.encyclo.co.uk/webster/C/172
Coun`ter·mure' transitive verb [
imperfect & past participle Countermured (-m?rd');
present participle & verbal noun Countermuring .] [ Confer French
contremurer .] To fortify with a wall behind another wall. [ R.]
Kyd. Found on
http://www.encyclo.co.uk/webster/C/172

In fortifications a countermure is a wall raised behind another, so as to supply its place when breached or destroyed.
Found on
http://www.probertencyclopaedia.com/browse/FC.HTM
No exact match found.