"prolongeront" meaning in French

{
  "head_templates": [
    {
      "args": {
        "1": "fr",
        "2": "verb form"
      },
      "expansion": "prolongeront",
      "name": "head"
    }
  ],
  "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "prolonger"
        }
      ],
      "glosses": [
        "third-person plural simple future of prolonger"
      ],
      "id": "en-prolongeront-fr-verb-yTiB7YDB",
      "links": [
        [
          "prolonger",
          "prolonger#French"
        ]
      ],
      "tags": [
        "form-of",
        "future",
        "plural",
        "third-person"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pʁɔ.lɔ̃ʒ.ʁɔ̃/"
    }
  ],
  "word": "prolongeront"
}

{
  "head_templates": [
    {
      "args": {
        "1": "fr",
        "2": "verb form"
      },
      "expansion": "prolongeront",
      "name": "head"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "French 3-syllable words",
        "French entries with incorrect language header",
        "French non-lemma forms",
        "French terms with IPA pronunciation",
        "French verb forms",
        "Pages with 1 entry"
      ],
      "form_of": [
        {
          "word": "prolonger"
        }
      ],
      "glosses": [
        "third-person plural simple future of prolonger"
      ],
      "links": [
        [
          "prolonger",
          "prolonger#French"
        ]
      ],
      "tags": [
        "form-of",
        "future",
        "plural",
        "third-person"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pʁɔ.lɔ̃ʒ.ʁɔ̃/"
    }
  ],
  "word": "prolongeront"
}