"air door" meaning in English

{
  "forms": [
    {
      "form": "air doors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "air door (plural air doors)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mechanical engineering",
          "orig": "en:Mechanical engineering",
          "parents": [
            "Engineering",
            "Applied sciences",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A device used to prevent air, contaminants, or flying insects from moving from one open space to another."
      ],
      "id": "en-air_door-en-noun-57wBPS1C",
      "links": [
        [
          "device",
          "device"
        ],
        [
          "air",
          "air"
        ],
        [
          "contaminant",
          "contaminant"
        ],
        [
          "flying",
          "flying"
        ],
        [
          "insect",
          "insect"
        ]
      ],
      "synonyms": [
        {
          "word": "air curtain"
        }
      ]
    }
  ],
  "word": "air door"
}

{
  "forms": [
    {
      "form": "air doors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "air door (plural air doors)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Mechanical engineering"
      ],
      "glosses": [
        "A device used to prevent air, contaminants, or flying insects from moving from one open space to another."
      ],
      "links": [
        [
          "device",
          "device"
        ],
        [
          "air",
          "air"
        ],
        [
          "contaminant",
          "contaminant"
        ],
        [
          "flying",
          "flying"
        ],
        [
          "insect",
          "insect"
        ]
      ],
      "synonyms": [
        {
          "word": "air curtain"
        }
      ]
    }
  ],
  "word": "air door"
}