"castellen" meaning in Middle English

{
  "head_templates": [
    {
      "args": {
        "1": "enm",
        "2": "verb"
      },
      "expansion": "castellen",
      "name": "head"
    }
  ],
  "lang": "Middle English",
  "lang_code": "enm",
  "pos": "verb",
  "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": "1387–1400, Geoffrey Chaucer, “(please specify the story)”, in The Canterbury Tales, [Westminster: William Caxton, published 1478], →OCLC; republished in [William Thynne], editor, The Workes of Geffray Chaucer Newlye Printed, […], [London]: […] [Richard Grafton for] Iohn Reynes […], 1542, →OCLC:",
          "text": "...Bake metes and dish metes... peynted and castelled with papir...",
          "type": "quote"
        }
      ],
      "glosses": [
        "To make into a castle"
      ],
      "id": "en-castellen-enm-verb-PYLkdRWM"
    }
  ],
  "word": "castellen"
}

{
  "head_templates": [
    {
      "args": {
        "1": "enm",
        "2": "verb"
      },
      "expansion": "castellen",
      "name": "head"
    }
  ],
  "lang": "Middle English",
  "lang_code": "enm",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Middle English entries with incorrect language header",
        "Middle English lemmas",
        "Middle English terms with quotations",
        "Middle English verbs",
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for translations of Middle English quotations"
      ],
      "examples": [
        {
          "ref": "1387–1400, Geoffrey Chaucer, “(please specify the story)”, in The Canterbury Tales, [Westminster: William Caxton, published 1478], →OCLC; republished in [William Thynne], editor, The Workes of Geffray Chaucer Newlye Printed, […], [London]: […] [Richard Grafton for] Iohn Reynes […], 1542, →OCLC:",
          "text": "...Bake metes and dish metes... peynted and castelled with papir...",
          "type": "quote"
        }
      ],
      "glosses": [
        "To make into a castle"
      ]
    }
  ],
  "word": "castellen"
}