"Pas de Calais" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "la",
        "3": "-"
      },
      "expansion": "Latin",
      "name": "uder"
    }
  ],
  "etymology_text": "pas 'a pass, strait' (from Latin passus 'step, pace') + de 'of' + Calais",
  "head_templates": [
    {
      "args": {},
      "expansion": "Pas de Calais ?",
      "name": "fr-proper noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "fr",
          "name": "France",
          "orig": "fr:France",
          "parents": [
            "Europe",
            "Earth",
            "Eurasia",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "fr",
          "name": "Straits",
          "orig": "fr:Straits",
          "parents": [
            "Bodies of water",
            "Places",
            "Landforms",
            "Water",
            "Names",
            "Earth",
            "Liquids",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Nature",
            "Matter",
            "Fundamental",
            "Nouns",
            "Chemistry",
            "Lemmas",
            "Sciences"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "fr",
          "name": "United Kingdom",
          "orig": "fr:United Kingdom",
          "parents": [
            "British Isles",
            "Europe",
            "Islands",
            "Earth",
            "Eurasia",
            "Places",
            "Nature",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "Pas-de-Calais"
        }
      ],
      "glosses": [
        "the English Channel or Strait of Dover, the North Sea strait between Dover (England) and Calais (France)"
      ],
      "id": "en-Pas_de_Calais-fr-name--e6dNPB2",
      "links": [
        [
          "English Channel",
          "English Channel"
        ],
        [
          "Strait of Dover",
          "Strait of Dover"
        ],
        [
          "North Sea",
          "North Sea"
        ],
        [
          "strait",
          "strait"
        ],
        [
          "Dover",
          "Dover"
        ],
        [
          "Calais",
          "Calais"
        ]
      ]
    }
  ],
  "word": "Pas de Calais"
}

{
  "derived": [
    {
      "word": "Pas-de-Calais"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "la",
        "3": "-"
      },
      "expansion": "Latin",
      "name": "uder"
    }
  ],
  "etymology_text": "pas 'a pass, strait' (from Latin passus 'step, pace') + de 'of' + Calais",
  "head_templates": [
    {
      "args": {},
      "expansion": "Pas de Calais ?",
      "name": "fr-proper noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "French entries with incorrect language header",
        "French lemmas",
        "French multiword terms",
        "French proper nouns",
        "French terms derived from Latin",
        "French undefined derivations",
        "Pages with 2 entries",
        "Pages with entries",
        "Requests for gender in French entries",
        "fr:France",
        "fr:Straits",
        "fr:United Kingdom"
      ],
      "glosses": [
        "the English Channel or Strait of Dover, the North Sea strait between Dover (England) and Calais (France)"
      ],
      "links": [
        [
          "English Channel",
          "English Channel"
        ],
        [
          "Strait of Dover",
          "Strait of Dover"
        ],
        [
          "North Sea",
          "North Sea"
        ],
        [
          "strait",
          "strait"
        ],
        [
          "Dover",
          "Dover"
        ],
        [
          "Calais",
          "Calais"
        ]
      ]
    }
  ],
  "word": "Pas de Calais"
}