"أربعمائة" meaning in Arabic

{
  "forms": [
    {
      "form": "أَرْبَعُمِائَة",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ʾarbaʿumiʾah",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "أَرْبَعُمِائَة",
        "tr": "ʾarbaʿumiʾah"
      },
      "expansion": "أَرْبَعُمِائَة • (ʾarbaʿumiʾah) ?",
      "name": "ar-numeral"
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Arabic cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Arabic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "four hundred"
      ],
      "id": "en-أربعمائة-ar-num-gq8xCA4i",
      "links": [
        [
          "four hundred",
          "four hundred"
        ]
      ]
    }
  ],
  "word": "أربعمائة"
}

{
  "forms": [
    {
      "form": "أَرْبَعُمِائَة",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ʾarbaʿumiʾah",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "أَرْبَعُمِائَة",
        "tr": "ʾarbaʿumiʾah"
      },
      "expansion": "أَرْبَعُمِائَة • (ʾarbaʿumiʾah) ?",
      "name": "ar-numeral"
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Arabic cardinal numbers",
        "Arabic entries with incorrect language header",
        "Arabic lemmas",
        "Arabic numerals",
        "Requests for gender in Arabic entries"
      ],
      "glosses": [
        "four hundred"
      ],
      "links": [
        [
          "four hundred",
          "four hundred"
        ]
      ]
    }
  ],
  "word": "أربعمائة"
}