"noises off" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "p"
      },
      "expansion": "noises off pl (plural only)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Theater",
          "orig": "en:Theater",
          "parents": [
            "Art",
            "Entertainment",
            "Culture",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "82 18",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "74 26",
          "kind": "other",
          "name": "English pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1934, Alfred Kenneth Boyd, The Technique of Play Production",
          "text": "A separate section is given to this subject because as a rule the importance of noises off is badly underestimated in the amateur theatre.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Sound effects produced offstage."
      ],
      "id": "en-noises_off-en-noun-SHUtASS7",
      "links": [
        [
          "theater",
          "theater"
        ],
        [
          "Sound effect",
          "sound effect"
        ],
        [
          "offstage",
          "offstage"
        ]
      ],
      "raw_glosses": [
        "(theater) Sound effects produced offstage."
      ],
      "related": [
        {
          "_dis1": "56 44",
          "word": "sound off"
        }
      ],
      "tags": [
        "plural",
        "plural-only"
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "theater"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "ref": "2002, Colin Jones, The Great Nation, Penguin, published 2003, page 515",
          "text": "The political situation after the Year V elections developed into a war of position between rival factions, with muffled insurrectionary noises off supplied by bellicose neo-Jacobins and sabre-rattling royalists.",
          "type": "quotation"
        },
        {
          "ref": "2023 June 30, Marina Hyde, “The tide is coming in fast on Rishi Sunak – and it’s full of sewage”, in The Guardian",
          "text": "Amazing, given the gravity of those, that noises-off to the main event continue to be bleatings by the likes of Jacob Rees-Mogg and Nadine Dorries […] who have now put five times more effort into greasing up to Boris Johnson than they ever did into public service.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Something occurring on the margins or periphery of a given event, situation etc."
      ],
      "id": "en-noises_off-en-noun-ChfalfEy",
      "links": [
        [
          "margin",
          "margin"
        ],
        [
          "periphery",
          "periphery"
        ]
      ],
      "raw_glosses": [
        "(by extension) Something occurring on the margins or periphery of a given event, situation etc."
      ],
      "tags": [
        "broadly",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "noises off"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English pluralia tantum"
  ],
  "head_templates": [
    {
      "args": {
        "1": "p"
      },
      "expansion": "noises off pl (plural only)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "sound off"
    }
  ],
  "senses": [
    {
      "categories": [
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Theater"
      ],
      "examples": [
        {
          "ref": "1934, Alfred Kenneth Boyd, The Technique of Play Production",
          "text": "A separate section is given to this subject because as a rule the importance of noises off is badly underestimated in the amateur theatre.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Sound effects produced offstage."
      ],
      "links": [
        [
          "theater",
          "theater"
        ],
        [
          "Sound effect",
          "sound effect"
        ],
        [
          "offstage",
          "offstage"
        ]
      ],
      "raw_glosses": [
        "(theater) Sound effects produced offstage."
      ],
      "tags": [
        "plural",
        "plural-only"
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "theater"
      ]
    },
    {
      "categories": [
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2002, Colin Jones, The Great Nation, Penguin, published 2003, page 515",
          "text": "The political situation after the Year V elections developed into a war of position between rival factions, with muffled insurrectionary noises off supplied by bellicose neo-Jacobins and sabre-rattling royalists.",
          "type": "quotation"
        },
        {
          "ref": "2023 June 30, Marina Hyde, “The tide is coming in fast on Rishi Sunak – and it’s full of sewage”, in The Guardian",
          "text": "Amazing, given the gravity of those, that noises-off to the main event continue to be bleatings by the likes of Jacob Rees-Mogg and Nadine Dorries […] who have now put five times more effort into greasing up to Boris Johnson than they ever did into public service.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Something occurring on the margins or periphery of a given event, situation etc."
      ],
      "links": [
        [
          "margin",
          "margin"
        ],
        [
          "periphery",
          "periphery"
        ]
      ],
      "raw_glosses": [
        "(by extension) Something occurring on the margins or periphery of a given event, situation etc."
      ],
      "tags": [
        "broadly",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "noises off"
}