"осамнаест" meaning in Serbo-Croatian

{
  "forms": [
    {
      "form": "оса̀мнае̄ст",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "osàmnaēst",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "оса̀мнае̄ст"
      },
      "expansion": "оса̀мнае̄ст (Latin spelling osàmnaēst)",
      "name": "sh-numeral"
    }
  ],
  "lang": "Serbo-Croatian",
  "lang_code": "sh",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Serbo-Croatian cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Serbo-Croatian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "eighteen"
      ],
      "id": "en-осамнаест-sh-num-NDV7GKvd",
      "links": [
        [
          "eighteen",
          "eighteen"
        ]
      ]
    }
  ],
  "word": "осамнаест"
}

{
  "forms": [
    {
      "form": "оса̀мнае̄ст",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "osàmnaēst",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "оса̀мнае̄ст"
      },
      "expansion": "оса̀мнае̄ст (Latin spelling osàmnaēst)",
      "name": "sh-numeral"
    }
  ],
  "lang": "Serbo-Croatian",
  "lang_code": "sh",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Serbo-Croatian cardinal numbers",
        "Serbo-Croatian entries with incorrect language header",
        "Serbo-Croatian lemmas",
        "Serbo-Croatian numerals"
      ],
      "glosses": [
        "eighteen"
      ],
      "links": [
        [
          "eighteen",
          "eighteen"
        ]
      ]
    }
  ],
  "word": "осамнаест"
}