"sink-hole" meaning in English

{
  "forms": [
    {
      "form": "sink-holes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sink-hole (plural sink-holes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "sinkhole"
        }
      ],
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      "examples": [
        {
          "ref": "1998, Richard O'Neill, “Big Trouble in China”, in Natural Disasters, Parragon, →ISBN, →OCLC, page 18, column 3:",
          "text": "The violence of the quake hurled people 2m (6ft) into the air, and within a matter of seconds 95 per cent of Tang-shan had collapsed into rubble. The earth split open into wide fissures and thousands of sink-holes, trees were uprooted and railroad tracks buckled. Amazingly, coal-miners working in the solid rock deep below Tang-shan survived the violent shaking that razed the city above them.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative spelling of sinkhole"
      ],
      "id": "en-sink-hole-en-noun-1EU5b6En",
      "links": [
        [
          "sinkhole",
          "sinkhole#English"
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      "wikipedia": [
        "sink-hole"
      ]
    }
  ],
  "word": "sink-hole"
}

{
  "forms": [
    {
      "form": "sink-holes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sink-hole (plural sink-holes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "sinkhole"
        }
      ],
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      "examples": [
        {
          "ref": "1998, Richard O'Neill, “Big Trouble in China”, in Natural Disasters, Parragon, →ISBN, →OCLC, page 18, column 3:",
          "text": "The violence of the quake hurled people 2m (6ft) into the air, and within a matter of seconds 95 per cent of Tang-shan had collapsed into rubble. The earth split open into wide fissures and thousands of sink-holes, trees were uprooted and railroad tracks buckled. Amazingly, coal-miners working in the solid rock deep below Tang-shan survived the violent shaking that razed the city above them.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative spelling of sinkhole"
      ],
      "links": [
        [
          "sinkhole",
          "sinkhole#English"
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      ],
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        "alt-of",
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      "wikipedia": [
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      ]
    }
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  "word": "sink-hole"
}