"dead week" meaning in English

{
  "etymology_text": "Possibly from the propensity during this period for students to cram for final exams and complete term papers, often resulting in sleep deprivation, increased irritability, and stress. Also possibly from the lack of classes or activities scheduled during this period, in order to allow more study time.",
  "forms": [
    {
      "form": "dead weeks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dead week (plural dead weeks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Time",
          "orig": "en:Time",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "In a college or university, the week immediately preceding finals week."
      ],
      "id": "en-dead_week-en-noun-2ZD3HhvG",
      "links": [
        [
          "college",
          "college"
        ],
        [
          "university",
          "university"
        ],
        [
          "finals week",
          "finals week"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "Canada"
          ],
          "word": "reading week"
        },
        {
          "tags": [
            "Commonwealth"
          ],
          "word": "swot vac"
        }
      ]
    }
  ],
  "word": "dead week"
}

{
  "etymology_text": "Possibly from the propensity during this period for students to cram for final exams and complete term papers, often resulting in sleep deprivation, increased irritability, and stress. Also possibly from the lack of classes or activities scheduled during this period, in order to allow more study time.",
  "forms": [
    {
      "form": "dead weeks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dead week (plural dead weeks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Time"
      ],
      "glosses": [
        "In a college or university, the week immediately preceding finals week."
      ],
      "links": [
        [
          "college",
          "college"
        ],
        [
          "university",
          "university"
        ],
        [
          "finals week",
          "finals week"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "Canada"
      ],
      "word": "reading week"
    },
    {
      "tags": [
        "Commonwealth"
      ],
      "word": "swot vac"
    }
  ],
  "word": "dead week"
}