Bible Dictionaries
Countermure

Webster's Dictionary

(1):

(n.) A wall raised behind another, to supply its place when breached or destroyed. [R.] Cf. Contramure.

(2):

(v. t.) To fortify with a wall behind another wall.

Bibliography Information
Webster, Noah. Entry for 'Countermure'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​c/countermure.html. 1828.