"pro-slavist" meaning in English

{
  "forms": [
    {
      "form": "pro-slavists",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pro-slavist (plural pro-slavists)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "antonyms": [
        {
          "word": "abolitionist"
        },
        {
          "word": "antislavist"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Slavery",
          "orig": "en:Slavery",
          "parents": [
            "Society",
            "Work",
            "All topics",
            "Human activity",
            "Fundamental",
            "Human behaviour",
            "Human"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1890, W. A. Burt Jones, “Jones, John Rice”, in Chicago Historical Society's Collection, volume 4, page 239:",
          "text": "Among the signers was John Rice Jones, a consistent pro-slavist[…]",
          "type": "quote"
        },
        {
          "ref": "1921, S. K. Donovan, “John Brown at Harper's Ferry and Charlestown”, in Ohio Archæological and Historical Quarterly, page 322:",
          "text": "[…]and the other was Clement Vallandigham, of Ohio, then a hated pro-slavist and afterwards a noted opponent of the war to preserve the Union.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A supporter of slavery in the United States."
      ],
      "id": "en-pro-slavist-en-noun-VFeYJkGs",
      "links": [
        [
          "slavery",
          "slavery"
        ]
      ],
      "raw_glosses": [
        "(US, historical) A supporter of slavery in the United States."
      ],
      "synonyms": [
        {
          "word": "proslavist"
        }
      ],
      "tags": [
        "US",
        "historical"
      ]
    }
  ],
  "word": "pro-slavist"
}

{
  "forms": [
    {
      "form": "pro-slavists",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pro-slavist (plural pro-slavists)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "antonyms": [
        {
          "word": "abolitionist"
        },
        {
          "word": "antislavist"
        }
      ],
      "categories": [
        "American English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with historical senses",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Slavery"
      ],
      "examples": [
        {
          "ref": "1890, W. A. Burt Jones, “Jones, John Rice”, in Chicago Historical Society's Collection, volume 4, page 239:",
          "text": "Among the signers was John Rice Jones, a consistent pro-slavist[…]",
          "type": "quote"
        },
        {
          "ref": "1921, S. K. Donovan, “John Brown at Harper's Ferry and Charlestown”, in Ohio Archæological and Historical Quarterly, page 322:",
          "text": "[…]and the other was Clement Vallandigham, of Ohio, then a hated pro-slavist and afterwards a noted opponent of the war to preserve the Union.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A supporter of slavery in the United States."
      ],
      "links": [
        [
          "slavery",
          "slavery"
        ]
      ],
      "raw_glosses": [
        "(US, historical) A supporter of slavery in the United States."
      ],
      "tags": [
        "US",
        "historical"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "proslavist"
    }
  ],
  "word": "pro-slavist"
}