"under no circumstance" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase",
        "head": ""
      },
      "expansion": "under no circumstance",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "under no circumstance",
      "name": "en-PP"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Galician translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Greek translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Romanian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Spanish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "In no case, whatever happens; never."
      ],
      "id": "en-under_no_circumstance-en-prep_phrase-byuEaM4J",
      "related": [
        {
          "word": "under any circumstances"
        },
        {
          "word": "under all circumstances"
        }
      ],
      "synonyms": [
        {
          "word": "absolutely not"
        },
        {
          "word": "never"
        },
        {
          "word": "on no account"
        },
        {
          "word": "under no circumstances"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "under no conditions",
          "word": "ei missään tapauksessa"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "under no conditions",
          "word": "en aucun cas"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "under no conditions",
          "word": "sous aucun prétexte"
        },
        {
          "code": "gl",
          "lang": "Galician",
          "sense": "under no conditions",
          "word": "baixo ningunha circunstancia"
        },
        {
          "code": "el",
          "lang": "Greek",
          "roman": "se kamía períptosi",
          "sense": "under no conditions",
          "word": "σε καμία περίπτωση"
        },
        {
          "code": "ro",
          "lang": "Romanian",
          "sense": "under no conditions",
          "word": "sub nicio formă"
        },
        {
          "code": "ro",
          "lang": "Romanian",
          "sense": "under no conditions",
          "word": "în niciun caz"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "under no conditions",
          "word": "bajo ningún concepto"
        }
      ]
    }
  ],
  "word": "under no circumstance"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase",
        "head": ""
      },
      "expansion": "under no circumstance",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "under no circumstance",
      "name": "en-PP"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "related": [
    {
      "word": "under any circumstances"
    },
    {
      "word": "under all circumstances"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English prepositional phrases",
        "Terms with Finnish translations",
        "Terms with French translations",
        "Terms with Galician translations",
        "Terms with Greek translations",
        "Terms with Romanian translations",
        "Terms with Spanish translations"
      ],
      "glosses": [
        "In no case, whatever happens; never."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "absolutely not"
    },
    {
      "word": "never"
    },
    {
      "word": "on no account"
    },
    {
      "word": "under no circumstances"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "under no conditions",
      "word": "ei missään tapauksessa"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "under no conditions",
      "word": "en aucun cas"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "under no conditions",
      "word": "sous aucun prétexte"
    },
    {
      "code": "gl",
      "lang": "Galician",
      "sense": "under no conditions",
      "word": "baixo ningunha circunstancia"
    },
    {
      "code": "el",
      "lang": "Greek",
      "roman": "se kamía períptosi",
      "sense": "under no conditions",
      "word": "σε καμία περίπτωση"
    },
    {
      "code": "ro",
      "lang": "Romanian",
      "sense": "under no conditions",
      "word": "sub nicio formă"
    },
    {
      "code": "ro",
      "lang": "Romanian",
      "sense": "under no conditions",
      "word": "în niciun caz"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "under no conditions",
      "word": "bajo ningún concepto"
    }
  ],
  "word": "under no circumstance"
}