"cavalier" meaning in English

{
  "forms": [
    {
      "form": "cavalier",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "more cavalier",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most cavalier",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "more": "true"
      },
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "hyphenation": "cav‧a‧lier",
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [],
      "glosses": [
        "A cavalier person is someone who does not care enough about something important."
      ],
      "id": "simple-cavalier-en-adj-S0Djp5GZ",
      "raw_tags": [
        "countable"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old words",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A cavalier is a military man serving on horse."
      ],
      "id": "simple-cavalier-en-adj-yUdzm6wO",
      "raw_tags": [
        "countable",
        "old, no longer used"
      ],
      "synonyms": [
        {
          "word": "chevalier"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌkævəˈlɪɚ/"
    },
    {
      "audio": "en-au-cavalier.ogg",
      "raw_tags": [
        "Audio"
      ],
      "tags": [
        "Australia"
      ]
    }
  ],
  "word": "cavalier"
}

{
  "forms": [
    {
      "form": "cavalier",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "more cavalier",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most cavalier",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "more": "true"
      },
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "hyphenation": "cav‧a‧lier",
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Countable nouns"
      ],
      "glosses": [
        "A cavalier person is someone who does not care enough about something important."
      ],
      "raw_tags": [
        "countable"
      ]
    },
    {
      "categories": [
        "Countable nouns",
        "Old words"
      ],
      "glosses": [
        "A cavalier is a military man serving on horse."
      ],
      "raw_tags": [
        "countable",
        "old, no longer used"
      ],
      "synonyms": [
        {
          "word": "chevalier"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌkævəˈlɪɚ/"
    },
    {
      "audio": "en-au-cavalier.ogg",
      "raw_tags": [
        "Audio"
      ],
      "tags": [
        "Australia"
      ]
    }
  ],
  "word": "cavalier"
}