"countdown" meaning in English

{
  "categories": [],
  "etymology_templates": [
    {
      "args": {
        "1": "count",
        "2": "down"
      },
      "expansion": "count + down",
      "name": "compound"
    }
  ],
  "etymology_text": "count + down",
  "forms": [
    {
      "form": "countdown",
      "raw_tags": [
        "Singular"
      ]
    },
    {
      "form": "countdowns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "examples": [
        {
          "text": "The rocket crews are starting their countdown!"
        }
      ],
      "glosses": [
        "A countdown is an act of counting numbers in reverse until it reaches zero."
      ],
      "id": "simple-countdown-en-noun-XqJkUOF3"
    },
    {
      "examples": [
        {
          "text": "The clock is ticking to the countdown to the end of the war."
        }
      ],
      "glosses": [
        "A countdown is the final moments before the end of something."
      ],
      "id": "simple-countdown-en-noun-UpGzwFx4"
    },
    {
      "examples": [
        {
          "text": "A key toggles the countdown on and off."
        }
      ],
      "glosses": [
        "A countdown is a digital display that counts down, hence the name."
      ],
      "id": "simple-countdown-en-noun-9uFqUc22"
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈkaʊntˌdaʊn/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-countdown.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "countdown"
}

{
  "categories": [
    "Compound terms"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "count",
        "2": "down"
      },
      "expansion": "count + down",
      "name": "compound"
    }
  ],
  "etymology_text": "count + down",
  "forms": [
    {
      "form": "countdown",
      "raw_tags": [
        "Singular"
      ]
    },
    {
      "form": "countdowns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "examples": [
        {
          "text": "The rocket crews are starting their countdown!"
        }
      ],
      "glosses": [
        "A countdown is an act of counting numbers in reverse until it reaches zero."
      ]
    },
    {
      "examples": [
        {
          "text": "The clock is ticking to the countdown to the end of the war."
        }
      ],
      "glosses": [
        "A countdown is the final moments before the end of something."
      ]
    },
    {
      "examples": [
        {
          "text": "A key toggles the countdown on and off."
        }
      ],
      "glosses": [
        "A countdown is a digital display that counts down, hence the name."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈkaʊntˌdaʊn/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-countdown.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "countdown"
}