"port franc" meaning in French

{
  "forms": [
    {
      "form": "ports francs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "port franc m (plural ports francs)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "free port (port or other area with relaxed jurisdiction of customs or related national regulations)"
      ],
      "id": "en-port_franc-fr-noun-1uUT0ejq",
      "links": [
        [
          "free port",
          "free port"
        ]
      ],
      "related": [
        {
          "word": "zone franche"
        }
      ],
      "synonyms": [
        {
          "word": "port-franc"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pɔʁ fʁɑ̃/"
    }
  ],
  "word": "port franc"
}

{
  "forms": [
    {
      "form": "ports francs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "port franc m (plural ports francs)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "word": "zone franche"
    }
  ],
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French multiword terms",
        "French nouns",
        "French nouns with red links in their headword lines",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "free port (port or other area with relaxed jurisdiction of customs or related national regulations)"
      ],
      "links": [
        [
          "free port",
          "free port"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pɔʁ fʁɑ̃/"
    }
  ],
  "synonyms": [
    {
      "word": "port-franc"
    }
  ],
  "word": "port franc"
}