"llyn" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cy",
        "3": "llyn"
      },
      "expansion": "Welsh llyn",
      "name": "bor"
    }
  ],
  "etymology_text": "From Welsh llyn.",
  "forms": [
    {
      "form": "llyns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "llyn (plural llyns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "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 2 entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1884, Mountford John B. Baddeley, C. S. Ward, North Wales (part 1, page xi)",
          "text": "To enumerate all the llyns of Wales would take pages, but except Bala, there is scarcely one freshwater lake which is a main factor in any landscape of which it forms part."
        }
      ],
      "glosses": [
        "An upland lake in Wales."
      ],
      "id": "en-llyn-en-noun-Oi4iGiWU",
      "links": [
        [
          "upland",
          "upland"
        ],
        [
          "lake",
          "lake"
        ],
        [
          "Wales",
          "Wales"
        ]
      ]
    }
  ],
  "word": "llyn"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cy",
        "3": "llyn"
      },
      "expansion": "Welsh llyn",
      "name": "bor"
    }
  ],
  "etymology_text": "From Welsh llyn.",
  "forms": [
    {
      "form": "llyns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "llyn (plural llyns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms borrowed from Welsh",
        "English terms derived from Welsh",
        "Pages with 2 entries"
      ],
      "examples": [
        {
          "ref": "1884, Mountford John B. Baddeley, C. S. Ward, North Wales (part 1, page xi)",
          "text": "To enumerate all the llyns of Wales would take pages, but except Bala, there is scarcely one freshwater lake which is a main factor in any landscape of which it forms part."
        }
      ],
      "glosses": [
        "An upland lake in Wales."
      ],
      "links": [
        [
          "upland",
          "upland"
        ],
        [
          "lake",
          "lake"
        ],
        [
          "Wales",
          "Wales"
        ]
      ]
    }
  ],
  "word": "llyn"
}