"plain as a pikestaff" meaning in English

{
  "etymology_text": "The word \"pikestaff\" in this expression is a corruption of packstaff (“the staff used to carry a bundle over the shoulder”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "plain as a pikestaff (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English similes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Latvian translations",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1922 February, James Joyce, “[Episode 12: Cyclops]”, in Ulysses, Paris: Shakespeare and Company, […], →OCLC:",
          "text": "―Don't you know he's dead? says Joe. / ―Paddy Dignam dead! says Alf. / ―Ay, says Joe. / ―Sure I'm after seeing him not five minutes ago, says Alf, as plain as a pikestaff. / ―Who's dead? says Bob Doran. / ―You saw his ghost then, says Joe, God between us and harm.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of plain as day."
      ],
      "id": "en-plain_as_a_pikestaff-en-adj-Og67O6YJ",
      "links": [
        [
          "plain as day",
          "plain as day#English"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Synonym of plain as day."
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "plain as day"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "translations": [
        {
          "code": "lv",
          "lang": "Latvian",
          "sense": "extremely clear and plain to see",
          "word": "skaidrs kā diena"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-plain as a pikestaff.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/56/En-au-plain_as_a_pikestaff.ogg/En-au-plain_as_a_pikestaff.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/56/En-au-plain_as_a_pikestaff.ogg"
    }
  ],
  "word": "plain as a pikestaff"
}

{
  "etymology_text": "The word \"pikestaff\" in this expression is a corruption of packstaff (“the staff used to carry a bundle over the shoulder”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "plain as a pikestaff (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English similes",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Latvian translations"
      ],
      "examples": [
        {
          "ref": "1922 February, James Joyce, “[Episode 12: Cyclops]”, in Ulysses, Paris: Shakespeare and Company, […], →OCLC:",
          "text": "―Don't you know he's dead? says Joe. / ―Paddy Dignam dead! says Alf. / ―Ay, says Joe. / ―Sure I'm after seeing him not five minutes ago, says Alf, as plain as a pikestaff. / ―Who's dead? says Bob Doran. / ―You saw his ghost then, says Joe, God between us and harm.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of plain as day."
      ],
      "links": [
        [
          "plain as day",
          "plain as day#English"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Synonym of plain as day."
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "plain as day"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-plain as a pikestaff.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/56/En-au-plain_as_a_pikestaff.ogg/En-au-plain_as_a_pikestaff.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/56/En-au-plain_as_a_pikestaff.ogg"
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  "translations": [
    {
      "code": "lv",
      "lang": "Latvian",
      "sense": "extremely clear and plain to see",
      "word": "skaidrs kā diena"
    }
  ],
  "word": "plain as a pikestaff"
}