- A rampart or other defensive entrenchment.
#*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. â 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 circumvallation than a rude barrier of palisades. â Walter Scott, Ivanhoe