"espérance de vie" meaning in French

{
  "forms": [
    {
      "form": "espérances de vie",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "espérance de vie f (plural espérances de vie)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "_dis1": "54 46",
      "word": "durée de vie"
    },
    {
      "_dis1": "54 46",
      "word": "longévité"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Demography",
          "orig": "fr:Demography",
          "parents": [
            "Sciences",
            "Statistics",
            "All topics",
            "Formal sciences",
            "Mathematics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "61 39",
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "63 37",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "78 22",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "life expectancy (years of expected life according to statistical tables)"
      ],
      "id": "en-espérance_de_vie-fr-noun-sljt-ge3",
      "links": [
        [
          "demography",
          "demography"
        ],
        [
          "life expectancy",
          "life expectancy"
        ]
      ],
      "raw_glosses": [
        "(demography) life expectancy (years of expected life according to statistical tables)"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "demographics",
        "demography"
      ]
    },
    {
      "glosses": [
        "mean time to breakdown"
      ],
      "id": "en-espérance_de_vie-fr-noun-CdgOt31L",
      "links": [
        [
          "mean",
          "mean"
        ],
        [
          "breakdown",
          "breakdown"
        ]
      ],
      "qualifier": "machinery maintenance",
      "raw_glosses": [
        "(machinery maintenance) mean time to breakdown"
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɛs.pe.ʁɑ̃s də vi/"
    },
    {
      "audio": "LL-Q150 (fra)-Lepticed7-espérance de vie.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/d/d6/LL-Q150_%28fra%29-Lepticed7-esp%C3%A9rance_de_vie.wav/LL-Q150_%28fra%29-Lepticed7-esp%C3%A9rance_de_vie.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/d/d6/LL-Q150_%28fra%29-Lepticed7-esp%C3%A9rance_de_vie.wav/LL-Q150_%28fra%29-Lepticed7-esp%C3%A9rance_de_vie.wav.ogg"
    }
  ],
  "word": "espérance de vie"
}

{
  "categories": [
    "French countable nouns",
    "French entries with incorrect language header",
    "French feminine nouns",
    "French lemmas",
    "French multiword terms",
    "French nouns",
    "French terms with IPA pronunciation",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "espérances de vie",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "espérance de vie f (plural espérances de vie)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "word": "durée de vie"
    },
    {
      "word": "longévité"
    }
  ],
  "senses": [
    {
      "categories": [
        "fr:Demography"
      ],
      "glosses": [
        "life expectancy (years of expected life according to statistical tables)"
      ],
      "links": [
        [
          "demography",
          "demography"
        ],
        [
          "life expectancy",
          "life expectancy"
        ]
      ],
      "raw_glosses": [
        "(demography) life expectancy (years of expected life according to statistical tables)"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "demographics",
        "demography"
      ]
    },
    {
      "glosses": [
        "mean time to breakdown"
      ],
      "links": [
        [
          "mean",
          "mean"
        ],
        [
          "breakdown",
          "breakdown"
        ]
      ],
      "qualifier": "machinery maintenance",
      "raw_glosses": [
        "(machinery maintenance) mean time to breakdown"
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɛs.pe.ʁɑ̃s də vi/"
    },
    {
      "audio": "LL-Q150 (fra)-Lepticed7-espérance de vie.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/d/d6/LL-Q150_%28fra%29-Lepticed7-esp%C3%A9rance_de_vie.wav/LL-Q150_%28fra%29-Lepticed7-esp%C3%A9rance_de_vie.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/d/d6/LL-Q150_%28fra%29-Lepticed7-esp%C3%A9rance_de_vie.wav/LL-Q150_%28fra%29-Lepticed7-esp%C3%A9rance_de_vie.wav.ogg"
    }
  ],
  "word": "espérance de vie"
}