"oughtn't" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ought",
        "3": "-n't"
      },
      "expansion": "ought + -n't",
      "name": "af"
    }
  ],
  "etymology_text": "From ought + -n't.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "oughtn't",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Commonwealth 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 suffixed with -n't",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Irish English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Philippine English",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "can't"
        },
        {
          "word": "couldn't"
        },
        {
          "word": "mayn't"
        },
        {
          "word": "mightn't"
        },
        {
          "word": "shan't"
        },
        {
          "word": "shouldn't"
        },
        {
          "word": "won't"
        },
        {
          "word": "wouldn't"
        }
      ],
      "glosses": [
        "(US, Philippines, dated, rare) ought not (negative auxiliary)."
      ],
      "id": "en-oughtn't-en-verb-Knes7LTg",
      "links": [
        [
          "ought",
          "ought"
        ],
        [
          "not",
          "not"
        ]
      ],
      "raw_glosses": [
        "(UK, Ireland, Commonwealth) (US, Philippines, dated, rare) ought not (negative auxiliary)."
      ],
      "related": [
        {
          "word": "oughten"
        }
      ],
      "tags": [
        "Commonwealth",
        "Ireland",
        "UK"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɔːnt/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/ˈɔː.tənt/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/ˈɔt.n̩t/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "/ˈɑt.n̩t/",
      "note": "cot-cought merger",
      "tags": [
        "US"
      ]
    },
    {
      "audio": "en-US oughtn't.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/66/En-US_oughtn%27t.ogg/En-US_oughtn%27t.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/6/66/En-US_oughtn%27t.ogg"
    },
    {
      "rhymes": "-ɔːnt"
    },
    {
      "rhymes": "-ɔːtənt"
    },
    {
      "rhymes": "-ɔtn̩t"
    },
    {
      "rhymes": "-ɑtn̩t"
    }
  ],
  "word": "oughtn't"
}

{
  "coordinate_terms": [
    {
      "word": "can't"
    },
    {
      "word": "couldn't"
    },
    {
      "word": "mayn't"
    },
    {
      "word": "mightn't"
    },
    {
      "word": "shan't"
    },
    {
      "word": "shouldn't"
    },
    {
      "word": "won't"
    },
    {
      "word": "wouldn't"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ought",
        "3": "-n't"
      },
      "expansion": "ought + -n't",
      "name": "af"
    }
  ],
  "etymology_text": "From ought + -n't.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "oughtn't",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "oughten"
    }
  ],
  "senses": [
    {
      "categories": [
        "American English",
        "British English",
        "Commonwealth English",
        "English auxiliary verb forms",
        "English contractions",
        "English dated terms",
        "English defective verbs",
        "English entries with incorrect language header",
        "English non-lemma forms",
        "English terms suffixed with -n't",
        "English terms with rare senses",
        "English verb forms",
        "Irish English",
        "Pages with 1 entry",
        "Pages with entries",
        "Philippine English",
        "Rhymes:English/ɑtn̩t",
        "Rhymes:English/ɑtn̩t/1 syllable",
        "Rhymes:English/ɔtn̩t",
        "Rhymes:English/ɔtn̩t/1 syllable",
        "Rhymes:English/ɔːnt",
        "Rhymes:English/ɔːnt/1 syllable",
        "Rhymes:English/ɔːtənt",
        "Rhymes:English/ɔːtənt/2 syllables"
      ],
      "glosses": [
        "(US, Philippines, dated, rare) ought not (negative auxiliary)."
      ],
      "links": [
        [
          "ought",
          "ought"
        ],
        [
          "not",
          "not"
        ]
      ],
      "raw_glosses": [
        "(UK, Ireland, Commonwealth) (US, Philippines, dated, rare) ought not (negative auxiliary)."
      ],
      "tags": [
        "Commonwealth",
        "Ireland",
        "UK"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɔːnt/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/ˈɔː.tənt/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/ˈɔt.n̩t/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "/ˈɑt.n̩t/",
      "note": "cot-cought merger",
      "tags": [
        "US"
      ]
    },
    {
      "audio": "en-US oughtn't.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/66/En-US_oughtn%27t.ogg/En-US_oughtn%27t.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/6/66/En-US_oughtn%27t.ogg"
    },
    {
      "rhymes": "-ɔːnt"
    },
    {
      "rhymes": "-ɔːtənt"
    },
    {
      "rhymes": "-ɔtn̩t"
    },
    {
      "rhymes": "-ɑtn̩t"
    }
  ],
  "word": "oughtn't"
}