"clear as crystal" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "clere as cristel"
      },
      "expansion": "Middle English clere as cristel",
      "name": "inh"
    }
  ],
  "etymology_text": "From Middle English clere as cristel.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "clear as crystal (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English similes",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "97 3",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Entirely transparent."
      ],
      "id": "en-clear_as_crystal-en-adj-lWVbQQSc",
      "links": [
        [
          "transparent",
          "transparent"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile, of an object) Entirely transparent."
      ],
      "raw_tags": [
        "of an object"
      ],
      "related": [
        {
          "_dis1": "100 0",
          "word": "clear as mud"
        }
      ],
      "synonyms": [
        {
          "_dis1": "100 0",
          "word": "crystal clear"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "translations": [
        {
          "_dis1": "98 2",
          "code": "fi",
          "lang": "Finnish",
          "sense": "transparent",
          "word": "kristallinkirkas"
        }
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "English similes",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Easily understandable."
      ],
      "id": "en-clear_as_crystal-en-adj-~z83UmTI",
      "links": [
        [
          "understandable",
          "understandable"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile, of a statement) Easily understandable."
      ],
      "raw_tags": [
        "of a statement"
      ],
      "tags": [
        "not-comparable"
      ],
      "translations": [
        {
          "_dis1": "4 96",
          "code": "fi",
          "lang": "Finnish",
          "sense": "understandable",
          "word": "kristallinkirkas"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-clear as crystal.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/4/4b/En-au-clear_as_crystal.ogg/En-au-clear_as_crystal.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/4/4b/En-au-clear_as_crystal.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "clear as crystal"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English terms derived from Middle English",
    "English terms inherited from Middle English",
    "English terms with audio links",
    "English uncomparable adjectives"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "clere as cristel"
      },
      "expansion": "Middle English clere as cristel",
      "name": "inh"
    }
  ],
  "etymology_text": "From Middle English clere as cristel.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "clear as crystal (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "clear as mud"
    }
  ],
  "senses": [
    {
      "categories": [
        "English similes"
      ],
      "glosses": [
        "Entirely transparent."
      ],
      "links": [
        [
          "transparent",
          "transparent"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile, of an object) Entirely transparent."
      ],
      "raw_tags": [
        "of an object"
      ],
      "tags": [
        "not-comparable"
      ]
    },
    {
      "categories": [
        "English similes"
      ],
      "glosses": [
        "Easily understandable."
      ],
      "links": [
        [
          "understandable",
          "understandable"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile, of a statement) Easily understandable."
      ],
      "raw_tags": [
        "of a statement"
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-clear as crystal.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/4/4b/En-au-clear_as_crystal.ogg/En-au-clear_as_crystal.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/4/4b/En-au-clear_as_crystal.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "word": "crystal clear"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "transparent",
      "word": "kristallinkirkas"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "understandable",
      "word": "kristallinkirkas"
    }
  ],
  "word": "clear as crystal"
}