"tête de pont" meaning in French

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "bridgehead",
            "clq": "1"
          },
          "expansion": "→ English: bridgehead (calque)",
          "name": "descendant"
        }
      ],
      "text": "→ English: bridgehead (calque)"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "it",
            "2": "testa di ponte",
            "clq": "1"
          },
          "expansion": "→ Italian: testa di ponte (calque)",
          "name": "descendant"
        }
      ],
      "text": "→ Italian: testa di ponte (calque)"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ru",
            "2": "тет-де-по́н",
            "bor": "1",
            "tr": "tɛt-dɛ-pón"
          },
          "expansion": "→ Russian: тет-де-по́н (tɛt-dɛ-pón)",
          "name": "descendant"
        }
      ],
      "text": "→ Russian: тет-де-по́н (tɛt-dɛ-pón)"
    }
  ],
  "forms": [
    {
      "form": "têtes de pont",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "tête de pont f (plural têtes de pont)",
      "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"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Military",
          "orig": "fr:Military",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "bridgehead; beachhead; airhead (area of hostile territory that, when captured, serves for the continuous landing (or movement into position) of further troops and material)"
      ],
      "id": "en-tête_de_pont-fr-noun-mTCFkTu1",
      "links": [
        [
          "military",
          "military"
        ],
        [
          "bridgehead",
          "bridgehead"
        ],
        [
          "beachhead",
          "beachhead"
        ],
        [
          "airhead",
          "airhead"
        ]
      ],
      "raw_glosses": [
        "(military) bridgehead; beachhead; airhead (area of hostile territory that, when captured, serves for the continuous landing (or movement into position) of further troops and material)"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tɛt də pɔ̃/"
    }
  ],
  "word": "tête de pont"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "bridgehead",
            "clq": "1"
          },
          "expansion": "→ English: bridgehead (calque)",
          "name": "descendant"
        }
      ],
      "text": "→ English: bridgehead (calque)"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "it",
            "2": "testa di ponte",
            "clq": "1"
          },
          "expansion": "→ Italian: testa di ponte (calque)",
          "name": "descendant"
        }
      ],
      "text": "→ Italian: testa di ponte (calque)"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ru",
            "2": "тет-де-по́н",
            "bor": "1",
            "tr": "tɛt-dɛ-pón"
          },
          "expansion": "→ Russian: тет-де-по́н (tɛt-dɛ-pón)",
          "name": "descendant"
        }
      ],
      "text": "→ Russian: тет-де-по́н (tɛt-dɛ-pón)"
    }
  ],
  "forms": [
    {
      "form": "têtes de pont",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "tête de pont f (plural têtes de pont)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "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",
        "fr:Military"
      ],
      "glosses": [
        "bridgehead; beachhead; airhead (area of hostile territory that, when captured, serves for the continuous landing (or movement into position) of further troops and material)"
      ],
      "links": [
        [
          "military",
          "military"
        ],
        [
          "bridgehead",
          "bridgehead"
        ],
        [
          "beachhead",
          "beachhead"
        ],
        [
          "airhead",
          "airhead"
        ]
      ],
      "raw_glosses": [
        "(military) bridgehead; beachhead; airhead (area of hostile territory that, when captured, serves for the continuous landing (or movement into position) of further troops and material)"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tɛt də pɔ̃/"
    }
  ],
  "word": "tête de pont"
}