"envoyer son gantelet" meaning in French

{
  "head_templates": [
    {
      "args": {},
      "expansion": "envoyer son gantelet",
      "name": "fr-verb"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "throw down the gauntlet"
      ],
      "id": "en-envoyer_son_gantelet-fr-verb-nN7~fHk0",
      "links": [
        [
          "throw down the gauntlet",
          "throw down the gauntlet"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) throw down the gauntlet"
      ],
      "related": [
        {
          "word": "ramasser le gantelet"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɑ̃.vwa.je sɔ̃ ɡɑ̃.tlɛ/"
    }
  ],
  "word": "envoyer son gantelet"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "envoyer son gantelet",
      "name": "fr-verb"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "verb",
  "related": [
    {
      "word": "ramasser le gantelet"
    }
  ],
  "senses": [
    {
      "categories": [
        "French entries with incorrect language header",
        "French idioms",
        "French lemmas",
        "French multiword terms",
        "French terms with IPA pronunciation",
        "French verbs"
      ],
      "glosses": [
        "throw down the gauntlet"
      ],
      "links": [
        [
          "throw down the gauntlet",
          "throw down the gauntlet"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) throw down the gauntlet"
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɑ̃.vwa.je sɔ̃ ɡɑ̃.tlɛ/"
    }
  ],
  "word": "envoyer son gantelet"
}