"crown it all" meaning in English

{
  "forms": [
    {
      "form": "crowns it all",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "crowning it all",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "crowned it all",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "crowned it all",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "crown it all (third-person singular simple present crowns it all, present participle crowning it all, simple past and past participle crowned it all)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with placeholder \"it\"",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1960 October, P. Ransome-Wallis, “Modern motive power of the German Federal Railway: Part Two”, in Trains Illustrated, page 611",
          "text": "A lovely crisp exhaust: a feeling of almost unlimited power combined with complete freedom of running: and, to crown it all, a most melodious and wholly American chime whistle—these were my immediate impressions as we stormed rapidly out of Göttingen, intent on winning back some of the lost time.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To be the final, or last-mentioned, event or occurrence in a series of particularly favourable / fortunate or unfavourable / unfortunate events."
      ],
      "id": "en-crown_it_all-en-verb-L4Tf2skA",
      "raw_glosses": [
        "(British) To be the final, or last-mentioned, event or occurrence in a series of particularly favourable / fortunate or unfavourable / unfortunate events."
      ],
      "synonyms": [
        {
          "word": "cap it all"
        },
        {
          "word": "top it off"
        }
      ],
      "tags": [
        "British"
      ]
    }
  ],
  "word": "crown it all"
}

{
  "forms": [
    {
      "form": "crowns it all",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "crowning it all",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "crowned it all",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "crowned it all",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "crown it all (third-person singular simple present crowns it all, present participle crowning it all, simple past and past participle crowned it all)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "British English",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with placeholder \"it\"",
        "English terms with quotations",
        "English verbs"
      ],
      "examples": [
        {
          "ref": "1960 October, P. Ransome-Wallis, “Modern motive power of the German Federal Railway: Part Two”, in Trains Illustrated, page 611",
          "text": "A lovely crisp exhaust: a feeling of almost unlimited power combined with complete freedom of running: and, to crown it all, a most melodious and wholly American chime whistle—these were my immediate impressions as we stormed rapidly out of Göttingen, intent on winning back some of the lost time.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To be the final, or last-mentioned, event or occurrence in a series of particularly favourable / fortunate or unfavourable / unfortunate events."
      ],
      "raw_glosses": [
        "(British) To be the final, or last-mentioned, event or occurrence in a series of particularly favourable / fortunate or unfavourable / unfortunate events."
      ],
      "synonyms": [
        {
          "word": "cap it all"
        },
        {
          "word": "top it off"
        }
      ],
      "tags": [
        "British"
      ]
    }
  ],
  "word": "crown it all"
}