"through bridge" meaning in English

{
  "forms": [
    {
      "form": "through bridges",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "through bridge (plural through bridges)",
      "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": "topical",
          "langcode": "en",
          "name": "Bridges",
          "orig": "en:Bridges",
          "parents": [
            "Buildings and structures",
            "Architecture",
            "Applied sciences",
            "Art",
            "Sciences",
            "Culture",
            "All topics",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A bridge whose floor is supported by the lower chords of the tissues instead of the upper, so that travel is between the trusses and not over them."
      ],
      "id": "en-through_bridge-en-noun-2jfkowUc",
      "links": [
        [
          "chord",
          "chord"
        ],
        [
          "tissue",
          "tissue"
        ],
        [
          "truss",
          "truss"
        ]
      ],
      "related": [
        {
          "word": "deck bridge"
        }
      ]
    }
  ],
  "word": "through bridge"
}

{
  "forms": [
    {
      "form": "through bridges",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "through bridge (plural through bridges)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "deck bridge"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Bridges"
      ],
      "glosses": [
        "A bridge whose floor is supported by the lower chords of the tissues instead of the upper, so that travel is between the trusses and not over them."
      ],
      "links": [
        [
          "chord",
          "chord"
        ],
        [
          "tissue",
          "tissue"
        ],
        [
          "truss",
          "truss"
        ]
      ]
    }
  ],
  "word": "through bridge"
}