"calendrier de l'Avent" meaning in French

{
  "forms": [
    {
      "form": "calendrier de l’ Avent",
      "tags": [
        "canonical",
        "masculine"
      ]
    },
    {
      "form": "calendriers de l’Avent",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "calendrier de l’Avent m (plural calendriers de l’Avent)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "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"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Christmas",
          "orig": "fr:Christmas",
          "parents": [
            "Christianity",
            "Holidays",
            "Abrahamism",
            "Observances",
            "Religion",
            "Calendar",
            "Culture",
            "Timekeeping",
            "Society",
            "Time",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Advent calendar"
      ],
      "id": "en-calendrier_de_l'Avent-fr-noun-~DwQMESM",
      "links": [
        [
          "Advent calendar",
          "Advent calendar"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ka.lɑ̃.dʁi.je d(ə) l‿a.vɑ̃/"
    }
  ],
  "word": "calendrier de l'Avent"
}

{
  "forms": [
    {
      "form": "calendrier de l’ Avent",
      "tags": [
        "canonical",
        "masculine"
      ]
    },
    {
      "form": "calendriers de l’Avent",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "calendrier de l’Avent m (plural calendriers de l’Avent)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French multiword terms",
        "French nouns",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries",
        "fr:Christmas"
      ],
      "glosses": [
        "Advent calendar"
      ],
      "links": [
        [
          "Advent calendar",
          "Advent calendar"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ka.lɑ̃.dʁi.je d(ə) l‿a.vɑ̃/"
    }
  ],
  "word": "calendrier de l'Avent"
}