"арван тав" meaning in Mongolian

{
  "forms": [
    {
      "form": "arvan tav",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ᠠᠷᠪᠠᠨ ᠲᠠᠪᠤ",
      "roman": "arban tabu",
      "tags": [
        "Mongolian"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ᠠᠷᠪᠠᠨ ᠲᠠᠪᠤ"
      },
      "expansion": "арван тав • (arvan tav) (Mongolian spelling ᠠᠷᠪᠠᠨ\nᠲᠠᠪᠤ (arban tabu))",
      "name": "mn-numeral"
    }
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Mongolian cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mongolian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mongolian terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "fifteen"
      ],
      "id": "en-арван_тав-mn-num-xGOWflcI",
      "links": [
        [
          "fifteen",
          "fifteen"
        ]
      ]
    }
  ],
  "word": "арван тав"
}

{
  "forms": [
    {
      "form": "arvan tav",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ᠠᠷᠪᠠᠨ ᠲᠠᠪᠤ",
      "roman": "arban tabu",
      "tags": [
        "Mongolian"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ᠠᠷᠪᠠᠨ ᠲᠠᠪᠤ"
      },
      "expansion": "арван тав • (arvan tav) (Mongolian spelling ᠠᠷᠪᠠᠨ\nᠲᠠᠪᠤ (arban tabu))",
      "name": "mn-numeral"
    }
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Mongolian cardinal numbers",
        "Mongolian entries with incorrect language header",
        "Mongolian lemmas",
        "Mongolian multiword terms",
        "Mongolian numerals",
        "Mongolian terms with redundant script codes",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "fifteen"
      ],
      "links": [
        [
          "fifteen",
          "fifteen"
        ]
      ]
    }
  ],
  "word": "арван тав"
}