"1D" meaning in English

{
  "forms": [
    {
      "form": "1Ds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "1D (plural 1Ds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "first down"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "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": [
        "Initialism of first down."
      ],
      "id": "en-1D-en-noun-97JjJfQg",
      "links": [
        [
          "American football",
          "American football"
        ],
        [
          "first down",
          "first down#English"
        ]
      ],
      "raw_glosses": [
        "(American football) Initialism of first down."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "American-football",
        "ball-games",
        "football",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "1D"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "1D",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "_dis": "63 37",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "derived": [
        {
          "word": "1Der"
        }
      ],
      "glosses": [
        "The British boy band One Direction."
      ],
      "id": "en-1D-en-name-R3s1BNiz",
      "links": [
        [
          "boy band",
          "boy band"
        ]
      ]
    }
  ],
  "word": "1D"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English proper nouns",
    "English terms spelled with numbers",
    "English uncountable nouns",
    "English words without vowels"
  ],
  "forms": [
    {
      "form": "1Ds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "1D (plural 1Ds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "first down"
        }
      ],
      "categories": [
        "English initialisms",
        "English links with redundant wikilinks",
        "en:Football (American)"
      ],
      "glosses": [
        "Initialism of first down."
      ],
      "links": [
        [
          "American football",
          "American football"
        ],
        [
          "first down",
          "first down#English"
        ]
      ],
      "raw_glosses": [
        "(American football) Initialism of first down."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "American-football",
        "ball-games",
        "football",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "1D"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English proper nouns",
    "English terms spelled with numbers",
    "English uncountable nouns",
    "English words without vowels"
  ],
  "derived": [
    {
      "word": "1Der"
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "1D",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "glosses": [
        "The British boy band One Direction."
      ],
      "links": [
        [
          "boy band",
          "boy band"
        ]
      ]
    }
  ],
  "word": "1D"
}