[ ˌsə:kəm'valeɪt ]
■ verb literary surround with or as if with a rampart.
■ adjective
1》 literary surrounded or surrounding as if by a rampart.
2》 Anatomy denoting papillae near the back of the tongue, surrounded by taste receptors.
Origin
C17: from L. circumvallat- , circumvallare 'surround with a rampart'.