"lights out" meaning in English

{
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      "expansion": "lights out",
      "name": "head"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "lights-out"
        }
      ],
      "glosses": [
        "Alternative form of lights-out"
      ],
      "id": "en-lights_out-en-noun-q0QfjRJh",
      "links": [
        [
          "lights-out",
          "lights-out#English"
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        "alt-of",
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    {
      "categories": [],
      "examples": [
        {
          "ref": "2007, Kathryn Deans, Glow",
          "text": "There had been one almighty BANG and then it had been lights out.",
          "type": "quotation"
        },
        {
          "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": "quotation"
        },
        {
          "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": "quotation"
        }
      ],
      "glosses": [
        "Unconsciousness."
      ],
      "id": "en-lights_out-en-noun-9xnlzdGj",
      "links": [
        [
          "Unconsciousness",
          "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",
  "senses": [
    {
      "categories": [
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          "_dis": "7 2 92",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w+disamb"
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      ],
      "form_of": [
        {
          "word": "light out"
        }
      ],
      "glosses": [
        "third-person singular simple present indicative of light out"
      ],
      "id": "en-lights_out-en-verb-8-LNEAdD",
      "links": [
        [
          "light out",
          "light out#English"
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        "third-person"
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  ],
  "word": "lights out"
}

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    "English lemmas",
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    "English nouns",
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  "head_templates": [
    {
      "args": {
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      "expansion": "lights out",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "lights-out"
        }
      ],
      "glosses": [
        "Alternative form of lights-out"
      ],
      "links": [
        [
          "lights-out",
          "lights-out#English"
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      "tags": [
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    {
      "categories": [
        "English terms with quotations"
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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": "quotation"
        },
        {
          "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": "quotation"
        },
        {
          "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": "quotation"
        }
      ],
      "glosses": [
        "Unconsciousness."
      ],
      "links": [
        [
          "Unconsciousness",
          "unconsciousness"
        ]
      ]
    }
  ],
  "word": "lights out"
}

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      "expansion": "lights out",
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  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "word": "light out"
        }
      ],
      "glosses": [
        "third-person singular simple present indicative of light out"
      ],
      "links": [
        [
          "light out",
          "light out#English"
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