"beyond one's ken" meaning in English

{
  "etymology_text": "From ken (“knowledge, understanding”).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase",
        "head": ""
      },
      "expansion": "beyond one's ken",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "beyond one's ken",
      "name": "en-prep phrase"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "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 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2011 January 6, David Carr, “Marshall McLuhan: Media Savant”, in The New York Times, →ISSN:",
          "text": "Much of what McLuhan wrote and some of what Coupland relates are beyond my ken, but I don’t know about that “hole in heaven” stuff.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Beyond one's knowledge or understanding."
      ],
      "id": "en-beyond_one's_ken-en-prep_phrase-3OsHTzIK",
      "links": [
        [
          "knowledge",
          "knowledge"
        ],
        [
          "understanding",
          "understanding"
        ]
      ]
    }
  ],
  "word": "beyond one's ken"
}

{
  "etymology_text": "From ken (“knowledge, understanding”).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase",
        "head": ""
      },
      "expansion": "beyond one's ken",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "beyond one's ken",
      "name": "en-prep phrase"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English prepositional phrases",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2011 January 6, David Carr, “Marshall McLuhan: Media Savant”, in The New York Times, →ISSN:",
          "text": "Much of what McLuhan wrote and some of what Coupland relates are beyond my ken, but I don’t know about that “hole in heaven” stuff.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Beyond one's knowledge or understanding."
      ],
      "links": [
        [
          "knowledge",
          "knowledge"
        ],
        [
          "understanding",
          "understanding"
        ]
      ]
    }
  ],
  "word": "beyond one's ken"
}