circumvallate

UK: /ˌsɜːkəmˈvæleɪt/ US: (sûr′kəm val′āt)

WordReference Random House Unabridged Dictionary of American English © 2025

cir•cum•val•late  (sûr′kəm val′āt), adj., v., -lat•ed, -lat•ing. 
adj. 

1. surrounded by or as if by a rampart.
2. Anatomy surrounded by a depression or wall-like ridge.

v.t. 

3. to surround with or as if with a rampart.

• Latin circumvallātus (past participle of circumvallāre to surround with a wall), equivalent. to circum- circum- + vall(um) rampart, wall + -ātus -ate¹
• 1655–65

cir′cum•val•la′tion, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

circumvallate / ˌsɜːkəmˈvæleɪt/ verb

1. (transitive) to surround with a defensive fortification

Etymology: 19th Century: from Latin circumvallāre, from circum- + vallum rampart

ˌcircumvalˈlation noun