"dead tired" meaning in English

{
  "etymology_text": "As if one were dead: utterly without energy. Compare bone-idle, knackered.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "dead tired (not comparable)",
      "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"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Italian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Serbo-Croatian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Swedish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Vietnamese translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Very tired; completely exhausted."
      ],
      "id": "en-dead_tired-en-adj-yqh6T58n",
      "links": [
        [
          "tired",
          "tired"
        ],
        [
          "exhausted",
          "exhausted"
        ]
      ],
      "tags": [
        "not-comparable"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "very tired",
          "word": "kuolemanväsynyt"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "very tired",
          "word": "todmüde"
        },
        {
          "code": "it",
          "lang": "Italian",
          "sense": "very tired",
          "tags": [
            "masculine"
          ],
          "word": "stanco morto"
        },
        {
          "code": "sh",
          "lang": "Serbo-Croatian",
          "sense": "very tired",
          "tags": [
            "Latin",
            "masculine"
          ],
          "word": "mrtav umoran"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "very tired",
          "word": "dödstrött"
        },
        {
          "code": "vi",
          "lang": "Vietnamese",
          "sense": "very tired",
          "word": "mệt rũ"
        }
      ]
    }
  ],
  "word": "dead tired"
}

{
  "etymology_text": "As if one were dead: utterly without energy. Compare bone-idle, knackered.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "dead tired (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English compound adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English uncomparable adjectives",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with German translations",
        "Terms with Italian translations",
        "Terms with Serbo-Croatian translations",
        "Terms with Swedish translations",
        "Terms with Vietnamese translations"
      ],
      "glosses": [
        "Very tired; completely exhausted."
      ],
      "links": [
        [
          "tired",
          "tired"
        ],
        [
          "exhausted",
          "exhausted"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "very tired",
      "word": "kuolemanväsynyt"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "very tired",
      "word": "todmüde"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "very tired",
      "tags": [
        "masculine"
      ],
      "word": "stanco morto"
    },
    {
      "code": "sh",
      "lang": "Serbo-Croatian",
      "sense": "very tired",
      "tags": [
        "Latin",
        "masculine"
      ],
      "word": "mrtav umoran"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "very tired",
      "word": "dödstrött"
    },
    {
      "code": "vi",
      "lang": "Vietnamese",
      "sense": "very tired",
      "word": "mệt rũ"
    }
  ],
  "word": "dead tired"
}