"old master" meaning in English

{
  "forms": [
    {
      "form": "old masters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "old master (plural old masters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Old Master"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              193,
              204
            ]
          ],
          "ref": "2025 September 28, Philip Oltermann, “Michaelina Wautier: the female Flemish artist now seen as an old master”, in The Guardian, →ISSN:",
          "text": "Opening on 30 September, the exhibition Michaelina Wautier, Painter for the first time gathers into one show all known works by an artist who is belatedly coming to be recognised as one of the old masters of her age.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative letter-case form of Old Master."
      ],
      "id": "en-old_master-en-noun-VQ1G4bg9",
      "links": [
        [
          "Old Master",
          "Old Master#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "old master"
}

{
  "forms": [
    {
      "form": "old masters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "old master (plural old masters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Old Master"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              193,
              204
            ]
          ],
          "ref": "2025 September 28, Philip Oltermann, “Michaelina Wautier: the female Flemish artist now seen as an old master”, in The Guardian, →ISSN:",
          "text": "Opening on 30 September, the exhibition Michaelina Wautier, Painter for the first time gathers into one show all known works by an artist who is belatedly coming to be recognised as one of the old masters of her age.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative letter-case form of Old Master."
      ],
      "links": [
        [
          "Old Master",
          "Old Master#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "old master"
}