"light-tight" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "light",
        "3": "tight",
        "pos1": "noun",
        "pos2": "adjective"
      },
      "expansion": "light (noun) + tight (adjective)",
      "name": "affix"
    }
  ],
  "etymology_text": "From light (noun) + tight (adjective).",
  "forms": [
    {
      "form": "more light-tight",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most light-tight",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "light-tight (comparative more light-tight, superlative most light-tight)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "2000, Stephen G. Anchell, The darkroom cookbook, page 127",
          "text": "From a practical point of view it is not always possible to achieve an absolute lighttight home darkroom.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Impervious to light; excluding the light perfectly."
      ],
      "id": "en-light-tight-en-adj-g0HoPuKt",
      "links": [
        [
          "Impervious",
          "impervious"
        ],
        [
          "perfectly",
          "perfectly"
        ]
      ],
      "related": [
        {
          "word": "For other similar compound words"
        },
        {
          "word": "the derived terms under tight"
        }
      ],
      "synonyms": [
        {
          "word": "lightproof"
        },
        {
          "word": "lighttight"
        }
      ],
      "translations": [
        {
          "code": "da",
          "lang": "Danish",
          "sense": "light-tight",
          "word": "lystæt"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "light-tight",
          "word": "lichtdicht"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "light-tight",
          "word": "lystett"
        },
        {
          "code": "nn",
          "lang": "Norwegian Nynorsk",
          "sense": "light-tight",
          "word": "ljostett"
        },
        {
          "code": "nn",
          "lang": "Norwegian Nynorsk",
          "sense": "light-tight",
          "word": "lystett"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "light-tight",
          "word": "ljustät"
        }
      ]
    }
  ],
  "sounds": [
    {
      "enpr": "lītʹtīt"
    }
  ],
  "word": "light-tight"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "light",
        "3": "tight",
        "pos1": "noun",
        "pos2": "adjective"
      },
      "expansion": "light (noun) + tight (adjective)",
      "name": "affix"
    }
  ],
  "etymology_text": "From light (noun) + tight (adjective).",
  "forms": [
    {
      "form": "more light-tight",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most light-tight",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "light-tight (comparative more light-tight, superlative most light-tight)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "For other similar compound words"
    },
    {
      "word": "the derived terms under tight"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English compound terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2000, Stephen G. Anchell, The darkroom cookbook, page 127",
          "text": "From a practical point of view it is not always possible to achieve an absolute lighttight home darkroom.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Impervious to light; excluding the light perfectly."
      ],
      "links": [
        [
          "Impervious",
          "impervious"
        ],
        [
          "perfectly",
          "perfectly"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "enpr": "lītʹtīt"
    }
  ],
  "synonyms": [
    {
      "word": "lightproof"
    },
    {
      "word": "lighttight"
    }
  ],
  "translations": [
    {
      "code": "da",
      "lang": "Danish",
      "sense": "light-tight",
      "word": "lystæt"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "light-tight",
      "word": "lichtdicht"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "light-tight",
      "word": "lystett"
    },
    {
      "code": "nn",
      "lang": "Norwegian Nynorsk",
      "sense": "light-tight",
      "word": "ljostett"
    },
    {
      "code": "nn",
      "lang": "Norwegian Nynorsk",
      "sense": "light-tight",
      "word": "lystett"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "light-tight",
      "word": "ljustät"
    }
  ],
  "word": "light-tight"
}