"شادترین" meaning in Persian

{
  "forms": [
    {
      "form": "šâd-tarin",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "fa",
        "2": "superlative adjective",
        "tr": "šâd-tarin"
      },
      "expansion": "شادترین • (šâd-tarin)",
      "name": "head"
    }
  ],
  "lang": "Persian",
  "lang_code": "fa",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Persian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "شاد"
        }
      ],
      "glosses": [
        "superlative degree of شاد"
      ],
      "id": "en-شادترین-fa-adj-mqPfSFCi",
      "links": [
        [
          "شاد",
          "شاد#Persian"
        ]
      ],
      "tags": [
        "form-of",
        "superlative"
      ]
    }
  ],
  "word": "شادترین"
}

{
  "forms": [
    {
      "form": "šâd-tarin",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "fa",
        "2": "superlative adjective",
        "tr": "šâd-tarin"
      },
      "expansion": "شادترین • (šâd-tarin)",
      "name": "head"
    }
  ],
  "lang": "Persian",
  "lang_code": "fa",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Persian entries with incorrect language header",
        "Persian non-lemma forms",
        "Persian superlative adjectives"
      ],
      "form_of": [
        {
          "word": "شاد"
        }
      ],
      "glosses": [
        "superlative degree of شاد"
      ],
      "links": [
        [
          "شاد",
          "شاد#Persian"
        ]
      ],
      "tags": [
        "form-of",
        "superlative"
      ]
    }
  ],
  "word": "شادترین"
}