"downfall" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Terms prefixed with down-",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "down",
        "2": "fall"
      },
      "expansion": "down- + fall",
      "name": "ety-prefix"
    }
  ],
  "etymology_text": "down- + fall",
  "forms": [
    {
      "form": "downfall",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "downfalls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "text": "The empire's downfall happened when the emperor was killed with out a prince."
        }
      ],
      "glosses": [
        "A downfall is a quick fall from power or riches."
      ],
      "id": "simple-downfall-en-noun-mdS2OmZ4",
      "raw_tags": [
        "countable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈdaʊnfɔːl/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-downfall.wav",
      "raw_tags": [
        "Audio"
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "downfall"
}

{
  "categories": [
    "Terms prefixed with down-"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "down",
        "2": "fall"
      },
      "expansion": "down- + fall",
      "name": "ety-prefix"
    }
  ],
  "etymology_text": "down- + fall",
  "forms": [
    {
      "form": "downfall",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "downfalls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Countable nouns"
      ],
      "examples": [
        {
          "text": "The empire's downfall happened when the emperor was killed with out a prince."
        }
      ],
      "glosses": [
        "A downfall is a quick fall from power or riches."
      ],
      "raw_tags": [
        "countable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈdaʊnfɔːl/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-downfall.wav",
      "raw_tags": [
        "Audio"
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "downfall"
}