- A rampart or other defensive entrenchment.
Etymology: From circumvallate.
- 1761: and in a word, would intrench and fortify them round with as many circumvallations and breast-works, as my uncle Toby would a citadel. " Laurence Sterne, The Life & Opinions of Tristram Shandy, Gentleman, vol. 3 (Penguin 2003, p. 201)
- 1819: The Saxon architect had exhausted his art in rendering the main keep defensible, and there was no other than a rude barrier of palisades. " Walter Scott, Ivanhoe
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