"roll back" meaning in English

{
  "derived": [
    {
      "_dis1": "0 0 0 0",
      "word": "rollback"
    },
    {
      "_dis1": "0 0 0 0",
      "word": "rollbackable"
    },
    {
      "_dis1": "0 0 0 0",
      "word": "roll back the years"
    }
  ],
  "forms": [
    {
      "form": "rolls back",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "rolling back",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "rolled back",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "rolled back",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "roll back (third-person singular simple present rolls back, present participle rolling back, simple past and past participle rolled back)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "text": "We had to roll back the changes to the database because of an unforeseen error.",
          "type": "example"
        }
      ],
      "glosses": [
        "To return to a prior state."
      ],
      "id": "en-roll_back-en-verb-Ni4AAngJ",
      "links": [
        [
          "return",
          "return"
        ],
        [
          "prior",
          "prior"
        ],
        [
          "state",
          "state"
        ]
      ],
      "raw_glosses": [
        "(transitive) To return to a prior state."
      ],
      "tags": [
        "transitive"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "text": "NASA will roll back the shuttle launch due to bad weather.",
          "type": "example"
        }
      ],
      "glosses": [
        "To postpone."
      ],
      "id": "en-roll_back-en-verb-t9HXxcQ8",
      "links": [
        [
          "postpone",
          "postpone"
        ]
      ],
      "raw_glosses": [
        "(transitive) To postpone."
      ],
      "tags": [
        "transitive"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Aviation",
          "orig": "en:Aviation",
          "parents": [
            "Aeronautics",
            "Transport",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "14 7 72 7",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "19 11 60 11",
          "kind": "other",
          "name": "English phrasal verbs with particle (back)",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2010 February 9, Air Accidents Investigation Branch, “1.16.4.2 Full-scale engine testing (L12)”, in Report on the accident to Boeing 777-236ER, G-YMMM, at London Heathrow Airport on 17 January 2008, archived from the original on 2022-04-12, page 92",
          "text": "In the previous tests, it was suspected that the volume of fuel contained in pipework had effects, both in the time taken for the restriction to affect engine performance and the nature of the fuel flow fluctuations after the engine had rolled back. Therefore, it was decided that the restriction would be simulated with the use of an orifice plate which could be introduced adjacent to the component being investigated.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To reduce thrust without having been commanded to do so."
      ],
      "id": "en-roll_back-en-verb-eqMqFZUM",
      "links": [
        [
          "aviation",
          "aviation"
        ],
        [
          "jet engine",
          "jet engine"
        ],
        [
          "reduce",
          "reduce"
        ],
        [
          "thrust",
          "thrust"
        ],
        [
          "command",
          "command"
        ]
      ],
      "raw_glosses": [
        "(intransitive, aviation, of a jet engine) To reduce thrust without having been commanded to do so."
      ],
      "raw_tags": [
        "of a jet engine"
      ],
      "tags": [
        "intransitive"
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "aviation",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    },
    {
      "categories": [],
      "glosses": [
        "To retreat."
      ],
      "id": "en-roll_back-en-verb-J1w728ft",
      "links": [
        [
          "retreat",
          "retreat"
        ]
      ],
      "raw_glosses": [
        "(intransitive) To retreat."
      ],
      "tags": [
        "intransitive"
      ]
    }
  ],
  "word": "roll back"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English phrasal verbs",
    "English phrasal verbs with particle (back)",
    "English verbs"
  ],
  "derived": [
    {
      "word": "rollback"
    },
    {
      "word": "rollbackable"
    },
    {
      "word": "roll back the years"
    }
  ],
  "forms": [
    {
      "form": "rolls back",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "rolling back",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "rolled back",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "rolled back",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "roll back (third-person singular simple present rolls back, present participle rolling back, simple past and past participle rolled back)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English terms with usage examples",
        "English transitive verbs"
      ],
      "examples": [
        {
          "text": "We had to roll back the changes to the database because of an unforeseen error.",
          "type": "example"
        }
      ],
      "glosses": [
        "To return to a prior state."
      ],
      "links": [
        [
          "return",
          "return"
        ],
        [
          "prior",
          "prior"
        ],
        [
          "state",
          "state"
        ]
      ],
      "raw_glosses": [
        "(transitive) To return to a prior state."
      ],
      "tags": [
        "transitive"
      ]
    },
    {
      "categories": [
        "English terms with usage examples",
        "English transitive verbs"
      ],
      "examples": [
        {
          "text": "NASA will roll back the shuttle launch due to bad weather.",
          "type": "example"
        }
      ],
      "glosses": [
        "To postpone."
      ],
      "links": [
        [
          "postpone",
          "postpone"
        ]
      ],
      "raw_glosses": [
        "(transitive) To postpone."
      ],
      "tags": [
        "transitive"
      ]
    },
    {
      "categories": [
        "English intransitive verbs",
        "English terms with quotations",
        "en:Aviation"
      ],
      "examples": [
        {
          "ref": "2010 February 9, Air Accidents Investigation Branch, “1.16.4.2 Full-scale engine testing (L12)”, in Report on the accident to Boeing 777-236ER, G-YMMM, at London Heathrow Airport on 17 January 2008, archived from the original on 2022-04-12, page 92",
          "text": "In the previous tests, it was suspected that the volume of fuel contained in pipework had effects, both in the time taken for the restriction to affect engine performance and the nature of the fuel flow fluctuations after the engine had rolled back. Therefore, it was decided that the restriction would be simulated with the use of an orifice plate which could be introduced adjacent to the component being investigated.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To reduce thrust without having been commanded to do so."
      ],
      "links": [
        [
          "aviation",
          "aviation"
        ],
        [
          "jet engine",
          "jet engine"
        ],
        [
          "reduce",
          "reduce"
        ],
        [
          "thrust",
          "thrust"
        ],
        [
          "command",
          "command"
        ]
      ],
      "raw_glosses": [
        "(intransitive, aviation, of a jet engine) To reduce thrust without having been commanded to do so."
      ],
      "raw_tags": [
        "of a jet engine"
      ],
      "tags": [
        "intransitive"
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "aviation",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    },
    {
      "categories": [
        "English intransitive verbs"
      ],
      "glosses": [
        "To retreat."
      ],
      "links": [
        [
          "retreat",
          "retreat"
        ]
      ],
      "raw_glosses": [
        "(intransitive) To retreat."
      ],
      "tags": [
        "intransitive"
      ]
    }
  ],
  "word": "roll back"
}