"run to earth" meaning in English

{
  "forms": [
    {
      "form": "runs to earth",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "running to earth",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "ran to earth",
      "tags": [
        "past"
      ]
    },
    {
      "form": "run to earth",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "run<,,ran,run> to earth"
      },
      "expansion": "run to earth (third-person singular simple present runs to earth, present participle running to earth, simple past ran to earth, past participle run to earth)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English links with manual fragments",
          "parents": [
            "Links with manual fragments",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Coordinate term: run in"
        },
        {
          "text": "We’ve been trying to contact that witness for ten days, but we still haven’t run him to earth.",
          "type": "example"
        },
        {
          "ref": "1968, Georgette Heyer, The Unknown Ajax, page 155",
          "text": "He went off to Rye, ran Ottershaw to earth in the Ship, and asked him what the devil he meant by it.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To find someone or something after a long and difficult search."
      ],
      "id": "en-run_to_earth-en-verb-GlhJDPJd",
      "links": [
        [
          "find",
          "find"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, transitive) To find someone or something after a long and difficult search."
      ],
      "synonyms": [
        {
          "word": "run down#English:_find after a long search"
        },
        {
          "word": "run to ground"
        }
      ],
      "tags": [
        "idiomatic",
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɜː(ɹ)θ"
    },
    {
      "audio": "En-au-run to earth.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f4/En-au-run_to_earth.ogg/En-au-run_to_earth.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/f4/En-au-run_to_earth.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "run to earth"
}

{
  "forms": [
    {
      "form": "runs to earth",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "running to earth",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "ran to earth",
      "tags": [
        "past"
      ]
    },
    {
      "form": "run to earth",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "run<,,ran,run> to earth"
      },
      "expansion": "run to earth (third-person singular simple present runs to earth, present participle running to earth, simple past ran to earth, past participle run to earth)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English links with manual fragments",
        "English multiword terms",
        "English terms with audio links",
        "English terms with quotations",
        "English terms with usage examples",
        "English transitive verbs",
        "English verbs",
        "Quotation templates to be cleaned",
        "Rhymes:English/ɜː(ɹ)θ",
        "Rhymes:English/ɜː(ɹ)θ/3 syllables"
      ],
      "examples": [
        {
          "text": "Coordinate term: run in"
        },
        {
          "text": "We’ve been trying to contact that witness for ten days, but we still haven’t run him to earth.",
          "type": "example"
        },
        {
          "ref": "1968, Georgette Heyer, The Unknown Ajax, page 155",
          "text": "He went off to Rye, ran Ottershaw to earth in the Ship, and asked him what the devil he meant by it.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To find someone or something after a long and difficult search."
      ],
      "links": [
        [
          "find",
          "find"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, transitive) To find someone or something after a long and difficult search."
      ],
      "synonyms": [
        {
          "word": "run down#English:_find after a long search"
        },
        {
          "word": "run to ground"
        }
      ],
      "tags": [
        "idiomatic",
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɜː(ɹ)θ"
    },
    {
      "audio": "En-au-run to earth.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f4/En-au-run_to_earth.ogg/En-au-run_to_earth.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/f4/En-au-run_to_earth.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "run to earth"
}