"contrast ratio" meaning in English

{
  "etymology_text": "contrast meaning the difference of white and black + ratio.",
  "forms": [
    {
      "form": "contrast ratios",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "contrast ratio (plural contrast ratios)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "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 French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Japanese translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Korean translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Technology",
          "orig": "en:Technology",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "ratio of the luminance of white to that of black of a display. A higher value means a higher contrast of white and black."
      ],
      "id": "en-contrast_ratio-en-noun-qn4vvGfq",
      "links": [
        [
          "technology",
          "technology"
        ],
        [
          "ratio",
          "ratio"
        ],
        [
          "luminance",
          "luminance"
        ],
        [
          "white",
          "white"
        ],
        [
          "black",
          "black"
        ],
        [
          "display",
          "display"
        ]
      ],
      "raw_glosses": [
        "(technology) ratio of the luminance of white to that of black of a display. A higher value means a higher contrast of white and black."
      ],
      "related": [
        {
          "word": "display"
        },
        {
          "word": "LCD"
        },
        {
          "word": "transparency"
        }
      ],
      "topics": [
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "technology"
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "ratio of luminances of white and black",
          "word": "rapport de contraste"
        },
        {
          "code": "ja",
          "lang": "Japanese",
          "roman": "kontorasuto hi",
          "sense": "ratio of luminances of white and black",
          "word": "コントラスト比"
        },
        {
          "code": "ko",
          "lang": "Korean",
          "roman": "konteuraseuteu bi",
          "sense": "ratio of luminances of white and black",
          "word": "콘트라스트 비"
        },
        {
          "code": "ko",
          "lang": "Korean",
          "roman": "myeong'ambi",
          "sense": "ratio of luminances of white and black",
          "word": "명암비"
        }
      ],
      "wikipedia": [
        "contrast ratio"
      ]
    }
  ],
  "word": "contrast ratio"
}

{
  "etymology_text": "contrast meaning the difference of white and black + ratio.",
  "forms": [
    {
      "form": "contrast ratios",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "contrast ratio (plural contrast ratios)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "display"
    },
    {
      "word": "LCD"
    },
    {
      "word": "transparency"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with French translations",
        "Terms with Japanese translations",
        "Terms with Korean translations",
        "en:Technology"
      ],
      "glosses": [
        "ratio of the luminance of white to that of black of a display. A higher value means a higher contrast of white and black."
      ],
      "links": [
        [
          "technology",
          "technology"
        ],
        [
          "ratio",
          "ratio"
        ],
        [
          "luminance",
          "luminance"
        ],
        [
          "white",
          "white"
        ],
        [
          "black",
          "black"
        ],
        [
          "display",
          "display"
        ]
      ],
      "raw_glosses": [
        "(technology) ratio of the luminance of white to that of black of a display. A higher value means a higher contrast of white and black."
      ],
      "topics": [
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "technology"
      ],
      "wikipedia": [
        "contrast ratio"
      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "ratio of luminances of white and black",
      "word": "rapport de contraste"
    },
    {
      "code": "ja",
      "lang": "Japanese",
      "roman": "kontorasuto hi",
      "sense": "ratio of luminances of white and black",
      "word": "コントラスト比"
    },
    {
      "code": "ko",
      "lang": "Korean",
      "roman": "konteuraseuteu bi",
      "sense": "ratio of luminances of white and black",
      "word": "콘트라스트 비"
    },
    {
      "code": "ko",
      "lang": "Korean",
      "roman": "myeong'ambi",
      "sense": "ratio of luminances of white and black",
      "word": "명암비"
    }
  ],
  "word": "contrast ratio"
}