"mightn't" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "might",
        "3": "n't"
      },
      "expansion": "might + -n't",
      "name": "suffix"
    }
  ],
  "etymology_text": "might + -n't",
  "head_templates": [
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      "args": {
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        "2": "verb form"
      },
      "expansion": "mightn't",
      "name": "head"
    }
  ],
  "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"
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          "parents": [
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -n't",
          "parents": [],
          "source": "w"
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        {
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          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
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          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "can't"
        },
        {
          "word": "couldn't"
        },
        {
          "word": "mayn't"
        },
        {
          "word": "oughtn't"
        },
        {
          "word": "shan't"
        },
        {
          "word": "shouldn't"
        },
        {
          "word": "won't"
        },
        {
          "word": "wouldn't"
        }
      ],
      "examples": [
        {
          "ref": "1931, Mary Hunter Austin, Starry Adventure, page 274",
          "text": "Her driver was new to the country; he mightn't be prepared for the leaping of the yellow water down dry arroyos, swift as the pouncings of a cat, or the snake-like slidings of tons of loosened rock and clay from the steep potreros […]",
          "type": "quotation"
        },
        {
          "ref": "1963, Perry Mason, The Case of the Greek Goddess (Television Season 6, Episode 25)",
          "text": "“But, mightn’t there have been something unusual about the Stimatis contract itself?” [Perry Mason cross-examining Roger Correll.]"
        },
        {
          "ref": "1974, Mario Vargas Llosa, Conversation in the Cathedral: A Novel, Harper & Row (First Rayo Edition, 2005), page 275",
          "text": "\"But at night she would still think the same thing: mightn't it be that he wouldn't come to see her anymore?\""
        }
      ],
      "glosses": [
        "might not (negative auxiliary)"
      ],
      "id": "en-mightn't-en-verb-oZ2IZeF5",
      "links": [
        [
          "might",
          "might"
        ],
        [
          "not",
          "not"
        ]
      ],
      "raw_glosses": [
        "(British) might not (negative auxiliary)"
      ],
      "tags": [
        "British"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmaɪtənt/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "[ˈmaɪʔn̩ʔ]",
      "tags": [
        "UK"
      ]
    },
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      "audio": "LL-Q1860 (eng)-Persent101-mightn't.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/a/ad/LL-Q1860_%28eng%29-Persent101-mightn%26%2339%3Bt.wav/LL-Q1860_%28eng%29-Persent101-mightn%26%2339%3Bt.wav.mp3",
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      "tags": [
        "US"
      ],
      "text": "Audio (US)"
    }
  ],
  "word": "mightn't"
}

{
  "coordinate_terms": [
    {
      "word": "can't"
    },
    {
      "word": "couldn't"
    },
    {
      "word": "mayn't"
    },
    {
      "word": "oughtn't"
    },
    {
      "word": "shan't"
    },
    {
      "word": "shouldn't"
    },
    {
      "word": "won't"
    },
    {
      "word": "wouldn't"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "might",
        "3": "n't"
      },
      "expansion": "might + -n't",
      "name": "suffix"
    }
  ],
  "etymology_text": "might + -n't",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "mightn't",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "British English",
        "English 2-syllable words",
        "English auxiliary verb forms",
        "English contractions",
        "English defective verbs",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English non-lemma forms",
        "English terms suffixed with -n't",
        "English terms with IPA pronunciation",
        "English terms with audio links",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "English verb forms",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1931, Mary Hunter Austin, Starry Adventure, page 274",
          "text": "Her driver was new to the country; he mightn't be prepared for the leaping of the yellow water down dry arroyos, swift as the pouncings of a cat, or the snake-like slidings of tons of loosened rock and clay from the steep potreros […]",
          "type": "quotation"
        },
        {
          "ref": "1963, Perry Mason, The Case of the Greek Goddess (Television Season 6, Episode 25)",
          "text": "“But, mightn’t there have been something unusual about the Stimatis contract itself?” [Perry Mason cross-examining Roger Correll.]"
        },
        {
          "ref": "1974, Mario Vargas Llosa, Conversation in the Cathedral: A Novel, Harper & Row (First Rayo Edition, 2005), page 275",
          "text": "\"But at night she would still think the same thing: mightn't it be that he wouldn't come to see her anymore?\""
        }
      ],
      "glosses": [
        "might not (negative auxiliary)"
      ],
      "links": [
        [
          "might",
          "might"
        ],
        [
          "not",
          "not"
        ]
      ],
      "raw_glosses": [
        "(British) might not (negative auxiliary)"
      ],
      "tags": [
        "British"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmaɪtənt/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "[ˈmaɪʔn̩ʔ]",
      "tags": [
        "UK"
      ]
    },
    {
      "audio": "LL-Q1860 (eng)-Persent101-mightn't.wav",
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      "tags": [
        "US"
      ],
      "text": "Audio (US)"
    }
  ],
  "word": "mightn't"
}