Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


tr.v. cir·cum·val·lat·ed, cir·cum·val·lat·ing, cir·cum·val·lates
To surround with or as if with a rampart.
1. (also -ĭt) Surrounded with or as if with a rampart.
2. Anatomy Surrounded by a ridge or raised, wall-like structure.

[Latin circumvallāre, circumvallāt- : circum-, circum- + vallum, rampart with palisades (from vallus, post, stake).]

cir′cum·val·la′tion n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in classic literature ?
But when once they passed the line of circumvallation and found themselves in the open plain, D'Artagnan, who was completely ignorant of what was going forward, thought it was time to demand an explanation.
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.
He seemed to dwell alone within a circumvallation of precious metal, leaving her outside with her school, her hospital, the sick mothers, and the feeble old men, mere insignificant vestiges of the initial inspiration" (221-22).