"dead roll" meaning in English

{
  "forms": [
    {
      "form": "dead rolls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dead roll (plural dead rolls)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Broadcasting",
          "orig": "en:Broadcasting",
          "parents": [
            "Media",
            "Telecommunications",
            "Communication",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The act of starting playback of a recording without broadcasting it, so that the station can join at a later time as required."
      ],
      "id": "en-dead_roll-en-noun-6oO5VQqN",
      "links": [
        [
          "broadcasting",
          "broadcasting#Noun"
        ],
        [
          "playback",
          "playback"
        ],
        [
          "recording",
          "recording"
        ],
        [
          "broadcast",
          "broadcast"
        ],
        [
          "station",
          "station"
        ],
        [
          "join",
          "join"
        ]
      ],
      "raw_glosses": [
        "(broadcasting) The act of starting playback of a recording without broadcasting it, so that the station can join at a later time as required."
      ],
      "topics": [
        "broadcasting",
        "media"
      ]
    }
  ],
  "word": "dead roll"
}

{
  "forms": [
    {
      "form": "dead rolls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dead roll (plural dead rolls)",
      "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:Broadcasting"
      ],
      "glosses": [
        "The act of starting playback of a recording without broadcasting it, so that the station can join at a later time as required."
      ],
      "links": [
        [
          "broadcasting",
          "broadcasting#Noun"
        ],
        [
          "playback",
          "playback"
        ],
        [
          "recording",
          "recording"
        ],
        [
          "broadcast",
          "broadcast"
        ],
        [
          "station",
          "station"
        ],
        [
          "join",
          "join"
        ]
      ],
      "raw_glosses": [
        "(broadcasting) The act of starting playback of a recording without broadcasting it, so that the station can join at a later time as required."
      ],
      "topics": [
        "broadcasting",
        "media"
      ]
    }
  ],
  "word": "dead roll"
}