"circumvallation" meaning in English

{
  "etymology_text": "From circumvallate.",
  "forms": [
    {
      "form": "circumvallations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "circumvallation (plural circumvallations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Ancient Greek translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Spanish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1761, Laurence Sterne, The Life & Opinions of Tristram Shandy, Gentleman, volume 3, Penguin, published 2003, page 201",
          "text": "[...] and in a word, would intrench and fortify them round with as many circumvallations and breast-works, as my uncle Toby would a citadel.",
          "type": "quotation"
        },
        {
          "ref": "1819, Walter Scott, Ivanhoe",
          "text": "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.",
          "type": "quotation"
        },
        {
          "ref": "1901, Henry James, Flickerbridge",
          "text": "He just managed to finish her in time—the day before the date fixed for his breaking ground on a greater business still, the circumvallation of Mrs. Dunn.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A rampart or other defensive entrenchment that entirely encircles the position being defended."
      ],
      "id": "en-circumvallation-en-noun-ZEXqYA9f",
      "links": [
        [
          "rampart",
          "rampart"
        ],
        [
          "entrenchment",
          "entrenchment"
        ]
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "rampart",
          "tags": [
            "feminine"
          ],
          "word": "circonvallation"
        },
        {
          "code": "grc",
          "lang": "Ancient Greek",
          "roman": "periteíkhisma",
          "sense": "rampart",
          "tags": [
            "neuter"
          ],
          "word": "περιτείχισμα"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "rampart",
          "tags": [
            "feminine"
          ],
          "word": "circunvalación"
        }
      ],
      "wikipedia": [
        "circumvallation"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sɜːkəmvæˈleɪʃən/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/sɚkəmvæˈleɪʃən/",
      "tags": [
        "General-American"
      ]
    }
  ],
  "word": "circumvallation"
}

{
  "etymology_text": "From circumvallate.",
  "forms": [
    {
      "form": "circumvallations",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "circumvallation (plural circumvallations)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English 5-syllable words",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with IPA pronunciation",
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "Terms with Ancient Greek translations",
        "Terms with French translations",
        "Terms with Spanish translations"
      ],
      "examples": [
        {
          "ref": "1761, Laurence Sterne, The Life & Opinions of Tristram Shandy, Gentleman, volume 3, Penguin, published 2003, page 201",
          "text": "[...] and in a word, would intrench and fortify them round with as many circumvallations and breast-works, as my uncle Toby would a citadel.",
          "type": "quotation"
        },
        {
          "ref": "1819, Walter Scott, Ivanhoe",
          "text": "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.",
          "type": "quotation"
        },
        {
          "ref": "1901, Henry James, Flickerbridge",
          "text": "He just managed to finish her in time—the day before the date fixed for his breaking ground on a greater business still, the circumvallation of Mrs. Dunn.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A rampart or other defensive entrenchment that entirely encircles the position being defended."
      ],
      "links": [
        [
          "rampart",
          "rampart"
        ],
        [
          "entrenchment",
          "entrenchment"
        ]
      ],
      "wikipedia": [
        "circumvallation"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sɜːkəmvæˈleɪʃən/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/sɚkəmvæˈleɪʃən/",
      "tags": [
        "General-American"
      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "rampart",
      "tags": [
        "feminine"
      ],
      "word": "circonvallation"
    },
    {
      "code": "grc",
      "lang": "Ancient Greek",
      "roman": "periteíkhisma",
      "sense": "rampart",
      "tags": [
        "neuter"
      ],
      "word": "περιτείχισμα"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "rampart",
      "tags": [
        "feminine"
      ],
      "word": "circunvalación"
    }
  ],
  "word": "circumvallation"
}