"bright as a button" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "bright as a button (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English similes",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "51 49",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1868, Sarah Stuart Robbins, Ned's motto, page 42",
          "text": "You needn't plague yourself about her no how, because she's bright as a button, and knows all about what you want and what you don't wan't , as well as a sensible being.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Very intelligent."
      ],
      "id": "en-bright_as_a_button-en-adj-Om7C9IFT",
      "links": [
        [
          "intelligent",
          "intelligent"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very intelligent."
      ],
      "synonyms": [
        {
          "_dis1": "100 0",
          "word": "bright as a new button"
        },
        {
          "_dis1": "100 0",
          "word": "bright as a new coin"
        },
        {
          "_dis1": "100 0",
          "word": "bright as a new dollar"
        },
        {
          "_dis1": "100 0",
          "word": "bright as a new penny"
        },
        {
          "_dis1": "100 0",
          "word": "bright as a new pin"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "translations": [
        {
          "_dis1": "96 4",
          "code": "fi",
          "lang": "Finnish",
          "sense": "intelligent",
          "word": "terävä kuin partaveitsi"
        }
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "English similes",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "51 49",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Very cheery, energetic and upbeat."
      ],
      "id": "en-bright_as_a_button-en-adj-M84O62mY",
      "links": [
        [
          "cheery",
          "cheery"
        ],
        [
          "energetic",
          "energetic"
        ],
        [
          "upbeat",
          "upbeat"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very cheery, energetic and upbeat."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-bright as a button.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/0d/En-au-bright_as_a_button.ogg/En-au-bright_as_a_button.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/0/0d/En-au-bright_as_a_button.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "bright as a button"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English terms with audio links",
    "English uncomparable adjectives"
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "bright as a button (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English similes",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1868, Sarah Stuart Robbins, Ned's motto, page 42",
          "text": "You needn't plague yourself about her no how, because she's bright as a button, and knows all about what you want and what you don't wan't , as well as a sensible being.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Very intelligent."
      ],
      "links": [
        [
          "intelligent",
          "intelligent"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very intelligent."
      ],
      "tags": [
        "not-comparable"
      ]
    },
    {
      "categories": [
        "English similes"
      ],
      "glosses": [
        "Very cheery, energetic and upbeat."
      ],
      "links": [
        [
          "cheery",
          "cheery"
        ],
        [
          "energetic",
          "energetic"
        ],
        [
          "upbeat",
          "upbeat"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very cheery, energetic and upbeat."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-bright as a button.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/0d/En-au-bright_as_a_button.ogg/En-au-bright_as_a_button.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/0/0d/En-au-bright_as_a_button.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "word": "bright as a new button"
    },
    {
      "word": "bright as a new coin"
    },
    {
      "word": "bright as a new dollar"
    },
    {
      "word": "bright as a new penny"
    },
    {
      "word": "bright as a new pin"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "intelligent",
      "word": "terävä kuin partaveitsi"
    }
  ],
  "word": "bright as a button"
}