"مبحث" meaning in Ottoman Turkish

{
  "etymology_templates": [
    {
      "args": {
        "1": "ota",
        "2": "ar",
        "3": "مَبْحَث"
      },
      "expansion": "Arabic مَبْحَث (mabḥaṯ)",
      "name": "der"
    }
  ],
  "etymology_text": "From Arabic مَبْحَث (mabḥaṯ).",
  "forms": [
    {
      "form": "mebhas",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ota",
        "2": "noun",
        "tr": "mebhas"
      },
      "expansion": "مبحث • (mebhas)",
      "name": "head"
    }
  ],
  "lang": "Ottoman Turkish",
  "lang_code": "ota",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "96 4",
          "kind": "other",
          "name": "Ottoman Turkish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "subject; topic of investigation or discussion"
      ],
      "id": "en-مبحث-ota-noun-WkLuDQL8",
      "links": [
        [
          "subject",
          "subject"
        ]
      ]
    },
    {
      "glosses": [
        "science"
      ],
      "id": "en-مبحث-ota-noun-eQ-tR0Sp"
    }
  ],
  "word": "مبحث"
}

{
  "categories": [
    "Ottoman Turkish entries with incorrect language header",
    "Ottoman Turkish lemmas",
    "Ottoman Turkish nouns",
    "Ottoman Turkish terms derived from Arabic"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ota",
        "2": "ar",
        "3": "مَبْحَث"
      },
      "expansion": "Arabic مَبْحَث (mabḥaṯ)",
      "name": "der"
    }
  ],
  "etymology_text": "From Arabic مَبْحَث (mabḥaṯ).",
  "forms": [
    {
      "form": "mebhas",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ota",
        "2": "noun",
        "tr": "mebhas"
      },
      "expansion": "مبحث • (mebhas)",
      "name": "head"
    }
  ],
  "lang": "Ottoman Turkish",
  "lang_code": "ota",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "subject; topic of investigation or discussion"
      ],
      "links": [
        [
          "subject",
          "subject"
        ]
      ]
    },
    {
      "glosses": [
        "science"
      ]
    }
  ],
  "word": "مبحث"
}