"sleeper ship" meaning in English

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      "form": "sleeper ships",
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  "lang_code": "en",
  "pos": "noun",
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          "name": "Interstellar travel",
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          "name": "Space colonization",
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      "coordinate_terms": [
        {
          "word": "generation ship"
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      "glosses": [
        "A spaceship, all or some of whose passengers are in suspended animation."
      ],
      "id": "en-sleeper_ship-en-noun-k97Vs3-3",
      "links": [
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          "science fiction",
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        [
          "spaceship",
          "spaceship"
        ],
        [
          "passenger",
          "passenger"
        ],
        [
          "suspended animation",
          "suspended animation"
        ]
      ],
      "raw_glosses": [
        "(science fiction) A spaceship, all or some of whose passengers are in suspended animation."
      ],
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        "publishing",
        "science-fiction"
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  "word": "sleeper ship"
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  "lang_code": "en",
  "pos": "noun",
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        "en:Interstellar travel",
        "en:Science fiction",
        "en:Space colonization",
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      "glosses": [
        "A spaceship, all or some of whose passengers are in suspended animation."
      ],
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        [
          "spaceship",
          "spaceship"
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          "passenger",
          "passenger"
        ],
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          "suspended animation",
          "suspended animation"
        ]
      ],
      "raw_glosses": [
        "(science fiction) A spaceship, all or some of whose passengers are in suspended animation."
      ],
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        "literature",
        "media",
        "publishing",
        "science-fiction"
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