"coisa em si" meaning in Portuguese

{
  "forms": [
    {
      "form": "coisas em si",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "coisa-em-si",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "++"
      },
      "expansion": "coisa em si f (plural coisas em si)",
      "name": "pt-noun"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Portuguese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "pt",
          "name": "Philosophy",
          "orig": "pt:Philosophy",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "thing-in-itself"
      ],
      "id": "en-coisa_em_si-pt-noun-NteCGW1q",
      "links": [
        [
          "philosophy",
          "philosophy"
        ],
        [
          "thing-in-itself",
          "thing-in-itself"
        ]
      ],
      "raw_glosses": [
        "(philosophy) thing-in-itself"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "human-sciences",
        "philosophy",
        "sciences"
      ]
    }
  ],
  "word": "coisa em si"
}

{
  "forms": [
    {
      "form": "coisas em si",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "coisa-em-si",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "++"
      },
      "expansion": "coisa em si f (plural coisas em si)",
      "name": "pt-noun"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Portuguese countable nouns",
        "Portuguese entries with incorrect language header",
        "Portuguese feminine nouns",
        "Portuguese lemmas",
        "Portuguese multiword terms",
        "Portuguese nouns",
        "pt:Philosophy"
      ],
      "glosses": [
        "thing-in-itself"
      ],
      "links": [
        [
          "philosophy",
          "philosophy"
        ],
        [
          "thing-in-itself",
          "thing-in-itself"
        ]
      ],
      "raw_glosses": [
        "(philosophy) thing-in-itself"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "human-sciences",
        "philosophy",
        "sciences"
      ]
    }
  ],
  "word": "coisa em si"
}