"my conscience" meaning in English

{
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1768, Laurence Sterne, A Sentimental Journey Through France and Italy",
          "text": "O, my conscience! said I, she had one but I never look'd into it.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Expressing astonishment."
      ],
      "id": "en-my_conscience-en-intj-BUnUpV1t",
      "links": [
        [
          "astonishment",
          "astonishment"
        ]
      ],
      "raw_glosses": [
        "(obsolete) Expressing astonishment."
      ],
      "synonyms": [
        {
          "word": "oh my Lord"
        },
        {
          "word": "by my conscience"
        },
        {
          "word": "upon my conscience"
        }
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "my conscience"
}

{
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "English terms with obsolete senses",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1768, Laurence Sterne, A Sentimental Journey Through France and Italy",
          "text": "O, my conscience! said I, she had one but I never look'd into it.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Expressing astonishment."
      ],
      "links": [
        [
          "astonishment",
          "astonishment"
        ]
      ],
      "raw_glosses": [
        "(obsolete) Expressing astonishment."
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "oh my Lord"
    },
    {
      "word": "by my conscience"
    },
    {
      "word": "upon my conscience"
    }
  ],
  "word": "my conscience"
}