"jumpseat" meaning in English

{
  "forms": [
    {
      "form": "jumpseats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "jumpseat (plural jumpseats)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "jump seat"
        }
      ],
      "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"
        }
      ],
      "examples": [
        {
          "ref": "1975, John H. Reed, Transportation Safety Board, Safety Information, page 30:",
          "text": "I have visited more than half a dozen carrier training facilities, spent over 150 hours on jumpseats, piloted a Lockheed 1011 from MIA to LAX, visited numerous towers, rapcons, and centers, and discussed our commercial Air Transport System with everyone involved.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of jump seat"
      ],
      "id": "en-jumpseat-en-noun-p~uI7mab",
      "links": [
        [
          "jump seat",
          "jump seat#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "jumpseat"
}

{
  "forms": [
    {
      "form": "jumpseats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "jumpseat (plural jumpseats)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "jump seat"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1975, John H. Reed, Transportation Safety Board, Safety Information, page 30:",
          "text": "I have visited more than half a dozen carrier training facilities, spent over 150 hours on jumpseats, piloted a Lockheed 1011 from MIA to LAX, visited numerous towers, rapcons, and centers, and discussed our commercial Air Transport System with everyone involved.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of jump seat"
      ],
      "links": [
        [
          "jump seat",
          "jump seat#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "jumpseat"
}