"umbrell" meaning in Middle English

{
  "head_templates": [
    {
      "args": {
        "1": "enm",
        "2": "noun"
      },
      "expansion": "umbrell",
      "name": "head"
    }
  ],
  "lang": "Middle English",
  "lang_code": "enm",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Middle 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": "1470–1485 (date produced), Thomas Malory, “Capitulum xj”, in [Le Morte Darthur], book V, [London: […] by William Caxton], published 31 July 1485, →OCLC; republished as H[einrich] Oskar Sommer, editor, Le Morte Darthur […], London: David Nutt, […], 1889, →OCLC:",
          "text": "Than dressed hym Sir Bors unto a sterne knyght and smote hym on the umbrell, that his neck braste.",
          "type": "quote"
        }
      ],
      "glosses": [
        "the visor of a helmet"
      ],
      "id": "en-umbrell-enm-noun-GU-ODoID",
      "links": [
        [
          "visor",
          "visor"
        ]
      ]
    }
  ],
  "word": "umbrell"
}

{
  "head_templates": [
    {
      "args": {
        "1": "enm",
        "2": "noun"
      },
      "expansion": "umbrell",
      "name": "head"
    }
  ],
  "lang": "Middle English",
  "lang_code": "enm",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Middle English entries with incorrect language header",
        "Middle English lemmas",
        "Middle English nouns",
        "Middle English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for translations of Middle English quotations"
      ],
      "examples": [
        {
          "ref": "1470–1485 (date produced), Thomas Malory, “Capitulum xj”, in [Le Morte Darthur], book V, [London: […] by William Caxton], published 31 July 1485, →OCLC; republished as H[einrich] Oskar Sommer, editor, Le Morte Darthur […], London: David Nutt, […], 1889, →OCLC:",
          "text": "Than dressed hym Sir Bors unto a sterne knyght and smote hym on the umbrell, that his neck braste.",
          "type": "quote"
        }
      ],
      "glosses": [
        "the visor of a helmet"
      ],
      "links": [
        [
          "visor",
          "visor"
        ]
      ]
    }
  ],
  "word": "umbrell"
}