"all change" meaning in All languages combined

{
  "etymology_text": "A request for all passengers to change trains.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "interjection"
      },
      "expansion": "all change",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "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": "Transport",
          "orig": "en:Transport",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "An announcement, heard especially on trains, instructing passengers to alight because the last stop has been reached."
      ],
      "id": "en-all_change-en-intj-N3GF3x-V",
      "links": [
        [
          "transport",
          "transport"
        ],
        [
          "announcement",
          "announcement"
        ],
        [
          "train",
          "train"
        ],
        [
          "passenger",
          "passenger"
        ],
        [
          "alight",
          "alight"
        ],
        [
          "stop",
          "stop"
        ]
      ],
      "raw_glosses": [
        "(transport) An announcement, heard especially on trains, instructing passengers to alight because the last stop has been reached."
      ],
      "topics": [
        "transport"
      ]
    }
  ],
  "word": "all change"
}

{
  "etymology_text": "A request for all passengers to change trains.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "interjection"
      },
      "expansion": "all change",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Transport"
      ],
      "glosses": [
        "An announcement, heard especially on trains, instructing passengers to alight because the last stop has been reached."
      ],
      "links": [
        [
          "transport",
          "transport"
        ],
        [
          "announcement",
          "announcement"
        ],
        [
          "train",
          "train"
        ],
        [
          "passenger",
          "passenger"
        ],
        [
          "alight",
          "alight"
        ],
        [
          "stop",
          "stop"
        ]
      ],
      "raw_glosses": [
        "(transport) An announcement, heard especially on trains, instructing passengers to alight because the last stop has been reached."
      ],
      "topics": [
        "transport"
      ]
    }
  ],
  "word": "all change"
}