"long-lost" meaning in English

{
  "forms": [
    {
      "form": "long lost",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "long-lost (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Mandarin translations",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "My long-lost brother showed up, borrowed money and vanished again.",
          "type": "example"
        }
      ],
      "glosses": [
        "Having been missing or unknown for a long period of time."
      ],
      "id": "en-long-lost-en-adj-COLENys5",
      "links": [
        [
          "time",
          "time"
        ]
      ],
      "tags": [
        "not-comparable"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "chángjiǔ bùjiàn de",
          "sense": "having been missing for a long period of time",
          "word": "長久不見的 /长久不见的"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "having been missing for a long period of time",
          "word": "kauan kaivattu"
        }
      ]
    }
  ],
  "word": "long-lost"
}

{
  "forms": [
    {
      "form": "long lost",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "long-lost (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with usage examples",
        "English uncomparable adjectives",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with Mandarin translations"
      ],
      "examples": [
        {
          "text": "My long-lost brother showed up, borrowed money and vanished again.",
          "type": "example"
        }
      ],
      "glosses": [
        "Having been missing or unknown for a long period of time."
      ],
      "links": [
        [
          "time",
          "time"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "chángjiǔ bùjiàn de",
      "sense": "having been missing for a long period of time",
      "word": "長久不見的 /长久不见的"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "having been missing for a long period of time",
      "word": "kauan kaivattu"
    }
  ],
  "word": "long-lost"
}