"first down" meaning in English

{
  "forms": [
    {
      "form": "first downs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "first down (plural first downs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "_dis1": "45 55",
      "word": "second down"
    },
    {
      "_dis1": "45 55",
      "word": "third down"
    },
    {
      "_dis1": "45 55",
      "word": "fourth down"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Football (American)",
          "orig": "en:Football (American)",
          "parents": [
            "Football",
            "Ball games",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The first play in a series that has a maximum of four downs."
      ],
      "id": "en-first_down-en-noun-EcUk5ecA",
      "links": [
        [
          "American football",
          "American football"
        ],
        [
          "play",
          "play"
        ],
        [
          "series",
          "series"
        ]
      ],
      "raw_glosses": [
        "(American football) The first play in a series that has a maximum of four downs."
      ],
      "topics": [
        "American-football",
        "ball-games",
        "football",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Football (American)",
          "orig": "en:Football (American)",
          "parents": [
            "Football",
            "Ball games",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "34 66",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The act of getting a first down by advancing the ball more than ten yards ahead of the field position where the team took possession."
      ],
      "id": "en-first_down-en-noun-yIYFHc6u",
      "links": [
        [
          "American football",
          "American football"
        ]
      ],
      "raw_glosses": [
        "(American football) The act of getting a first down by advancing the ball more than ten yards ahead of the field position where the team took possession."
      ],
      "topics": [
        "American-football",
        "ball-games",
        "football",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "first down"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "forms": [
    {
      "form": "first downs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "first down (plural first downs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "second down"
    },
    {
      "word": "third down"
    },
    {
      "word": "fourth down"
    }
  ],
  "senses": [
    {
      "categories": [
        "en:Football (American)"
      ],
      "glosses": [
        "The first play in a series that has a maximum of four downs."
      ],
      "links": [
        [
          "American football",
          "American football"
        ],
        [
          "play",
          "play"
        ],
        [
          "series",
          "series"
        ]
      ],
      "raw_glosses": [
        "(American football) The first play in a series that has a maximum of four downs."
      ],
      "topics": [
        "American-football",
        "ball-games",
        "football",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    },
    {
      "categories": [
        "en:Football (American)"
      ],
      "glosses": [
        "The act of getting a first down by advancing the ball more than ten yards ahead of the field position where the team took possession."
      ],
      "links": [
        [
          "American football",
          "American football"
        ]
      ],
      "raw_glosses": [
        "(American football) The act of getting a first down by advancing the ball more than ten yards ahead of the field position where the team took possession."
      ],
      "topics": [
        "American-football",
        "ball-games",
        "football",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "first down"
}