"lights out" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
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          "word": "lights-out"
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      "glosses": [
        "Alternative form of lights-out"
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          "lights-out#English"
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      "examples": [
        {
          "ref": "2007, Kathryn Deans, Glow:",
          "text": "There had been one almighty BANG and then it had been lights out.",
          "type": "quote"
        },
        {
          "ref": "2012, Anthony C. TriparI, Butchie, page 112:",
          "text": "It's lights out as Bruno is whacked on the back of his head with a black jack.",
          "type": "quote"
        },
        {
          "ref": "2012, Jeni Decker, I Wish I Were Engulfed in Flames:",
          "text": "Instant nausea, impaired vision, and the feeling of impending death, all prior to lights out.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Unconsciousness."
      ],
      "id": "en-lights_out-en-noun-9xnlzdGj",
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          "Unconsciousness",
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  "word": "lights out"
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      "expansion": "lights out",
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  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
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      "form_of": [
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          "word": "light out"
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        "third-person singular simple present indicative of light out"
      ],
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      "links": [
        [
          "light out",
          "light out#English"
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        "form-of",
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  "word": "lights out"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "word": "lights-out"
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        "Alternative form of lights-out"
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        {
          "ref": "2007, Kathryn Deans, Glow:",
          "text": "There had been one almighty BANG and then it had been lights out.",
          "type": "quote"
        },
        {
          "ref": "2012, Anthony C. TriparI, Butchie, page 112:",
          "text": "It's lights out as Bruno is whacked on the back of his head with a black jack.",
          "type": "quote"
        },
        {
          "ref": "2012, Jeni Decker, I Wish I Were Engulfed in Flames:",
          "text": "Instant nausea, impaired vision, and the feeling of impending death, all prior to lights out.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Unconsciousness."
      ],
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        [
          "Unconsciousness",
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  "word": "lights out"
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  "lang_code": "en",
  "pos": "verb",
  "senses": [
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        "third-person singular simple present indicative of light out"
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          "light out#English"
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