"under glass" meaning in English

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    {
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          "kind": "topical",
          "langcode": "en",
          "name": "Horticulture",
          "orig": "en:Horticulture",
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      "glosses": [
        "In a greenhouse, a cold frame, or a similar structure; said of the propagation and growth of plants."
      ],
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          "horticulture",
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          "greenhouse",
          "greenhouse"
        ],
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          "cold frame",
          "cold frame"
        ]
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      "raw_glosses": [
        "(horticulture, literal) In a greenhouse, a cold frame, or a similar structure; said of the propagation and growth of plants."
      ],
      "topics": [
        "agriculture",
        "business",
        "horticulture",
        "lifestyle"
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      "translations": [
        {
          "_dis1": "83 10 6",
          "code": "it",
          "lang": "Italian",
          "sense": "in a greenhouse",
          "word": "sottovetro"
        }
      ]
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    {
      "glosses": [
        "In a glass case, like an item in a museum."
      ],
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      "glosses": [
        "In jail."
      ],
      "id": "en-under_glass-en-prep_phrase-dpP6wgt6",
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          "jail",
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      "raw_glosses": [
        "(idiomatic, slang) In jail."
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      "translations": [
        {
          "_dis1": "16 2 82",
          "code": "fi",
          "lang": "Finnish",
          "sense": "slang: in jail",
          "word": "linnassa"
        },
        {
          "_dis1": "16 2 82",
          "code": "ru",
          "lang": "Russian",
          "roman": "za rešótkoj",
          "sense": "slang: in jail",
          "word": "за решёткой"
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  "word": "under glass"
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  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        "en:Horticulture"
      ],
      "glosses": [
        "In a greenhouse, a cold frame, or a similar structure; said of the propagation and growth of plants."
      ],
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        [
          "horticulture",
          "horticulture"
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        [
          "greenhouse",
          "greenhouse"
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          "cold frame",
          "cold frame"
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        "(horticulture, literal) In a greenhouse, a cold frame, or a similar structure; said of the propagation and growth of plants."
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        "agriculture",
        "business",
        "horticulture",
        "lifestyle"
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    {
      "glosses": [
        "In a glass case, like an item in a museum."
      ]
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      "glosses": [
        "In jail."
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        "(idiomatic, slang) In jail."
      ],
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  "translations": [
    {
      "code": "it",
      "lang": "Italian",
      "sense": "in a greenhouse",
      "word": "sottovetro"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "slang: in jail",
      "word": "linnassa"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "za rešótkoj",
      "sense": "slang: in jail",
      "word": "за решёткой"
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  ],
  "word": "under glass"
}