"slab avalanche" meaning in English

{
  "forms": [
    {
      "form": "slab avalanches",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "slab avalanche (plural slab avalanches)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
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        {
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      ],
      "glosses": [
        "A type of avalanche during which a cohesive, dense layer of snow (the slab) detaches from a weaker, less stable layer underneath, and slides downwards as a single, large block"
      ],
      "id": "en-slab_avalanche-en-noun-KYKHCbGJ",
      "links": [
        [
          "avalanche",
          "avalanche"
        ],
        [
          "slab",
          "slab"
        ]
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "lang_code": "cmn",
          "sense": "Translations",
          "word": "板狀雪崩 /板状雪崩"
        }
      ]
    }
  ],
  "word": "slab avalanche"
}

{
  "forms": [
    {
      "form": "slab avalanches",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "slab avalanche (plural slab avalanches)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Mandarin translations",
        "Translation table header lacks gloss"
      ],
      "glosses": [
        "A type of avalanche during which a cohesive, dense layer of snow (the slab) detaches from a weaker, less stable layer underneath, and slides downwards as a single, large block"
      ],
      "links": [
        [
          "avalanche",
          "avalanche"
        ],
        [
          "slab",
          "slab"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "lang_code": "cmn",
      "sense": "Translations",
      "word": "板狀雪崩 /板状雪崩"
    }
  ],
  "word": "slab avalanche"
}