"old-school" meaning in English

{
  "forms": [
    {
      "form": "more old-school",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most old-school",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "old-school (comparative more old-school, superlative most old-school)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "old school"
        }
      ],
      "categories": [
        {
          "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"
        }
      ],
      "examples": [
        {
          "ref": "1962 November, “Talking of Trains: The One-day Strike”, in Modern Railways, Shepperton, Surrey: Ian Allan Publishing, →ISSN, →OCLC, page 291:",
          "text": "Many railway officers complain that the deep interest of the old-school railwaymen in their job is dying; the B.T.C.'s new approach seems calculated to hasten its death and breed thousands more time-servers.",
          "type": "quote"
        },
        {
          "ref": "2019 October 23, Pip Dunn, “The Next King of Scotland”, in Rail, Peterborough, Cambridgeshire: Bauer Media, →ISSN, →OCLC, page 51:",
          "text": "The seat reservations are also old-school, with labels in the back of seats.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of old school"
      ],
      "id": "en-old-school-en-adj-j03I~RdA",
      "links": [
        [
          "old school",
          "old school#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "old-school"
}

{
  "forms": [
    {
      "form": "more old-school",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most old-school",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "old-school (comparative more old-school, superlative most old-school)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "old school"
        }
      ],
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1962 November, “Talking of Trains: The One-day Strike”, in Modern Railways, Shepperton, Surrey: Ian Allan Publishing, →ISSN, →OCLC, page 291:",
          "text": "Many railway officers complain that the deep interest of the old-school railwaymen in their job is dying; the B.T.C.'s new approach seems calculated to hasten its death and breed thousands more time-servers.",
          "type": "quote"
        },
        {
          "ref": "2019 October 23, Pip Dunn, “The Next King of Scotland”, in Rail, Peterborough, Cambridgeshire: Bauer Media, →ISSN, →OCLC, page 51:",
          "text": "The seat reservations are also old-school, with labels in the back of seats.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of old school"
      ],
      "links": [
        [
          "old school",
          "old school#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "old-school"
}