"anvil cloud" meaning in English

{
  "forms": [
    {
      "form": "anvil clouds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "anvil cloud (plural anvil clouds)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Clouds",
          "orig": "en:Clouds",
          "parents": [
            "Atmospheric phenomena",
            "Atmosphere",
            "Nature",
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "A tall thundercloud (cumulonimbus) whose top has reached the tropopause and become flat, creating a characteristic shape likened to an anvil."
      ],
      "id": "en-anvil_cloud-en-noun-ic8iYLHZ",
      "links": [
        [
          "thundercloud",
          "thundercloud"
        ],
        [
          "cumulonimbus",
          "cumulonimbus"
        ],
        [
          "tropopause",
          "tropopause"
        ]
      ],
      "synonyms": [
        {
          "word": "cumulonimbus incus"
        }
      ]
    }
  ],
  "word": "anvil cloud"
}

{
  "forms": [
    {
      "form": "anvil clouds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "anvil cloud (plural anvil clouds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
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        "en:Clouds"
      ],
      "glosses": [
        "A tall thundercloud (cumulonimbus) whose top has reached the tropopause and become flat, creating a characteristic shape likened to an anvil."
      ],
      "links": [
        [
          "thundercloud",
          "thundercloud"
        ],
        [
          "cumulonimbus",
          "cumulonimbus"
        ],
        [
          "tropopause",
          "tropopause"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "cumulonimbus incus"
    }
  ],
  "word": "anvil cloud"
}