"John Barleycorn" meaning in English

{
  "etymology_text": "John (commonly used to personify a concept) + barleycorn; barley is used to produce malt, the source of most British alcoholic drink.",
  "head_templates": [
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      "args": {
        "head": "John Barleycorn"
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      "expansion": "John Barleycorn",
      "name": "en-proper noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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          "source": "w"
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          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Beer",
          "orig": "en:Beer",
          "parents": [
            "Alcoholic beverages",
            "Beverages",
            "Recreational drugs",
            "Drinking",
            "Food and drink",
            "Liquids",
            "Drugs",
            "Human behaviour",
            "All topics",
            "Matter",
            "Pharmacology",
            "Human",
            "Fundamental",
            "Chemistry",
            "Nature",
            "Biochemistry",
            "Medicine",
            "Sciences",
            "Biology",
            "Healthcare",
            "Health",
            "Body"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a personification of alcoholic drink, particularly beer and whisky."
      ],
      "id": "en-John_Barleycorn-en-name-duIweb~v",
      "links": [
        [
          "personification",
          "personification"
        ],
        [
          "alcoholic",
          "alcoholic"
        ],
        [
          "drink",
          "drink"
        ],
        [
          "beer",
          "beer"
        ],
        [
          "whisky",
          "whisky"
        ]
      ],
      "wikipedia": [
        "John Barleycorn"
      ]
    }
  ],
  "word": "John Barleycorn"
}

{
  "etymology_text": "John (commonly used to personify a concept) + barleycorn; barley is used to produce malt, the source of most British alcoholic drink.",
  "head_templates": [
    {
      "args": {
        "head": "John Barleycorn"
      },
      "expansion": "John Barleycorn",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
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    {
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        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Beer"
      ],
      "glosses": [
        "a personification of alcoholic drink, particularly beer and whisky."
      ],
      "links": [
        [
          "personification",
          "personification"
        ],
        [
          "alcoholic",
          "alcoholic"
        ],
        [
          "drink",
          "drink"
        ],
        [
          "beer",
          "beer"
        ],
        [
          "whisky",
          "whisky"
        ]
      ],
      "wikipedia": [
        "John Barleycorn"
      ]
    }
  ],
  "word": "John Barleycorn"
}