"同一" meaning in Japanese

{
  "etymology_links": [
    [
      "同一",
      "同一#Chinese"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ja",
        "2": "zh",
        "3": "同一",
        "lit": "same + one",
        "sort": "とういつ'",
        "tr": "duwng + ʔjit"
      },
      "expansion": "Chinese 同一 (duwng + ʔjit, literally “same + one”)",
      "name": "bor"
    }
  ],
  "etymology_text": "From Chinese 同一 (duwng + ʔjit, literally “same + one”).",
  "forms": [
    {
      "form": "同一",
      "ruby": [
        [
          "同",
          "どう"
        ],
        [
          "一",
          "いつ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "dōitsu",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "どういつ"
      },
      "expansion": "同(どう)一(いつ) • (dōitsu)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Chinese terms with non-redundant manual transliterations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms read with on'yomi",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 2 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with Heiban pitch accent (Tōkyō)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "identity",
          "roman": "dōitsusei",
          "ruby": [
            [
              "同一性",
              "どういつせい"
            ]
          ],
          "translation": "identity",
          "word": "同一性"
        }
      ],
      "examples": [
        {
          "bold_roman_offsets": [
            [
              0,
              6
            ]
          ],
          "bold_text_offsets": [
            [
              0,
              2
            ]
          ],
          "english": "theory that [two people] are actually the same person",
          "roman": "dōitsu jinbutsu-setsu",
          "ruby": [
            [
              "同一",
              "どういつ"
            ],
            [
              "人物説",
              "じんぶつせつ"
            ]
          ],
          "text": "同一人物説",
          "translation": "theory that [two people] are actually the same person",
          "type": "example"
        }
      ],
      "glosses": [
        "identity, sameness"
      ],
      "id": "en-同一-ja-noun-Hb3bwVzX",
      "links": [
        [
          "identity",
          "identity"
        ],
        [
          "sameness",
          "sameness"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[do̞ːit͡sɨ]"
    },
    {
      "other": "どーいつ"
    }
  ],
  "word": "同一"
}

{
  "derived": [
    {
      "english": "identity",
      "roman": "dōitsusei",
      "ruby": [
        [
          "同一性",
          "どういつせい"
        ]
      ],
      "translation": "identity",
      "word": "同一性"
    }
  ],
  "etymology_links": [
    [
      "同一",
      "同一#Chinese"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ja",
        "2": "zh",
        "3": "同一",
        "lit": "same + one",
        "sort": "とういつ'",
        "tr": "duwng + ʔjit"
      },
      "expansion": "Chinese 同一 (duwng + ʔjit, literally “same + one”)",
      "name": "bor"
    }
  ],
  "etymology_text": "From Chinese 同一 (duwng + ʔjit, literally “same + one”).",
  "forms": [
    {
      "form": "同一",
      "ruby": [
        [
          "同",
          "どう"
        ],
        [
          "一",
          "いつ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "dōitsu",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "どういつ"
      },
      "expansion": "同(どう)一(いつ) • (dōitsu)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Chinese terms with non-redundant manual transliterations",
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms borrowed from Chinese",
        "Japanese terms derived from Chinese",
        "Japanese terms read with on'yomi",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms spelled with 一 read as いつ",
        "Japanese terms spelled with 同 read as どう",
        "Japanese terms with 2 kanji",
        "Japanese terms with Heiban pitch accent (Tōkyō)",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with IPA pronunciation with pitch accent",
        "Japanese terms with non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Japanese terms with usage examples",
        "Pages with 4 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "bold_roman_offsets": [
            [
              0,
              6
            ]
          ],
          "bold_text_offsets": [
            [
              0,
              2
            ]
          ],
          "english": "theory that [two people] are actually the same person",
          "roman": "dōitsu jinbutsu-setsu",
          "ruby": [
            [
              "同一",
              "どういつ"
            ],
            [
              "人物説",
              "じんぶつせつ"
            ]
          ],
          "text": "同一人物説",
          "translation": "theory that [two people] are actually the same person",
          "type": "example"
        }
      ],
      "glosses": [
        "identity, sameness"
      ],
      "links": [
        [
          "identity",
          "identity"
        ],
        [
          "sameness",
          "sameness"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[do̞ːit͡sɨ]"
    },
    {
      "other": "どーいつ"
    }
  ],
  "word": "同一"
}