"A3" meaning in English

{
  "etymology_text": "See the Wikipedia article ISO 216, the international standard on paper sizes.",
  "forms": [
    {
      "form": "A3s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "A3 (usually uncountable, plural A3s)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Management",
          "orig": "en:Management",
          "parents": [
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A one-page document, often tabular or graphical, on such paper."
      ],
      "id": "en-A3-en-noun-j-ID3BPd",
      "links": [
        [
          "management",
          "management"
        ]
      ],
      "raw_glosses": [
        "(countable, management) A one-page document, often tabular or graphical, on such paper."
      ],
      "tags": [
        "countable",
        "usually"
      ],
      "topics": [
        "management"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "16 84",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A3 class, a class of steam locomotive used on the London and North Eastern Railway."
      ],
      "id": "en-A3-en-noun-MO0XooJL",
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "raw_glosses": [
        "(UK, rail transport) A3 class, a class of steam locomotive used on the London and North Eastern Railway."
      ],
      "tags": [
        "UK",
        "uncountable",
        "usually"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "A3"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English terms spelled with numbers",
    "English uncountable nouns",
    "Pages with 3 entries",
    "Pages with entries"
  ],
  "etymology_text": "See the Wikipedia article ISO 216, the international standard on paper sizes.",
  "forms": [
    {
      "form": "A3s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "A3 (usually uncountable, plural A3s)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "en:Management"
      ],
      "glosses": [
        "A one-page document, often tabular or graphical, on such paper."
      ],
      "links": [
        [
          "management",
          "management"
        ]
      ],
      "raw_glosses": [
        "(countable, management) A one-page document, often tabular or graphical, on such paper."
      ],
      "tags": [
        "countable",
        "usually"
      ],
      "topics": [
        "management"
      ]
    },
    {
      "categories": [
        "British English",
        "en:Rail transportation"
      ],
      "glosses": [
        "A3 class, a class of steam locomotive used on the London and North Eastern Railway."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "raw_glosses": [
        "(UK, rail transport) A3 class, a class of steam locomotive used on the London and North Eastern Railway."
      ],
      "tags": [
        "UK",
        "uncountable",
        "usually"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "A3"
}