"empty threat" meaning in English

{
  "forms": [
    {
      "form": "empty threats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "empty threat (plural empty threats)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "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": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Polish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A threat made with no chance of being carried out."
      ],
      "id": "en-empty_threat-en-noun-uEMnrs47",
      "links": [
        [
          "threat",
          "threat"
        ],
        [
          "chance",
          "chance"
        ],
        [
          "carried out",
          "carry out"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "archaic"
          ],
          "word": "brutum fulmen"
        },
        {
          "word": "China's final warning"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "tyhjä uhkaus"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "perätön uhkaus"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "menace en l’air"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "pusta groźba"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "poslédneje kitájskoje predupreždénije",
          "sense": "Translations",
          "tags": [
            "neuter"
          ],
          "word": "после́днее кита́йское предупрежде́ние"
        }
      ]
    }
  ],
  "word": "empty threat"
}

{
  "forms": [
    {
      "form": "empty threats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "empty threat (plural empty threats)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with French translations",
        "Terms with Polish translations",
        "Terms with Russian translations",
        "Translation table header lacks gloss"
      ],
      "glosses": [
        "A threat made with no chance of being carried out."
      ],
      "links": [
        [
          "threat",
          "threat"
        ],
        [
          "chance",
          "chance"
        ],
        [
          "carried out",
          "carry out"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "archaic"
          ],
          "word": "brutum fulmen"
        },
        {
          "word": "China's final warning"
        }
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "tyhjä uhkaus"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "perätön uhkaus"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "menace en l’air"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "pusta groźba"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "poslédneje kitájskoje predupreždénije",
      "sense": "Translations",
      "tags": [
        "neuter"
      ],
      "word": "после́днее кита́йское предупрежде́ние"
    }
  ],
  "word": "empty threat"
}