"demonstrational" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "demonstration",
        "3": "al"
      },
      "expansion": "demonstration + -al",
      "name": "suffix"
    }
  ],
  "etymology_text": "demonstration + -al",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "demonstrational (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -al",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1939, American Society for Engineering Education, Proceedings, volume 47, page 296",
          "text": "In order to reduce the time spent in individual experimental work there has been a trend toward a demonstrational lecture procedure by means of which the student is given an opportunity to observe natural occurrences […]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Involving, or relating to, demonstration."
      ],
      "id": "en-demonstrational-en-adj-FRGfID6D",
      "links": [
        [
          "demonstration",
          "demonstration"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "demonstrational"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "demonstration",
        "3": "al"
      },
      "expansion": "demonstration + -al",
      "name": "suffix"
    }
  ],
  "etymology_text": "demonstration + -al",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "demonstrational (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -al",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1939, American Society for Engineering Education, Proceedings, volume 47, page 296",
          "text": "In order to reduce the time spent in individual experimental work there has been a trend toward a demonstrational lecture procedure by means of which the student is given an opportunity to observe natural occurrences […]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Involving, or relating to, demonstration."
      ],
      "links": [
        [
          "demonstration",
          "demonstration"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "demonstrational"
}