"billet doux" meaning in French

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "billet-doux",
            "bor": "1"
          },
          "expansion": "→ English: billet-doux",
          "name": "desc"
        }
      ],
      "text": "→ English: billet-doux"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "de",
            "2": "Billetdoux",
            "bor": "1"
          },
          "expansion": "→ German: Billetdoux",
          "name": "desc"
        }
      ],
      "text": "→ German: Billetdoux"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "sweet note"
      },
      "expansion": "“sweet note”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "sweet note"
      },
      "expansion": "Literally, “sweet note”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “sweet note”.",
  "forms": [
    {
      "form": "billets doux",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "billet doux m (plural billets doux)",
      "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"
        }
      ],
      "examples": [
        {
          "english": "What's left of the billets-doux / Of the months of April, the appointments / A memory that pursues me / Unceasingly",
          "ref": "1942, “Que reste-t-il de nos amours ?”, Charles Trenet (lyrics), Léo Chauliac (music)",
          "text": "Que reste-t-il des billets doux / Des mois d’avril, des rendez-vous / Un souvenir qui me poursuit / Sans cesse",
          "type": "quotation"
        }
      ],
      "glosses": [
        "billet-doux"
      ],
      "id": "en-billet_doux-fr-noun-safGp2M-",
      "links": [
        [
          "billet-doux",
          "billet-doux"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/bi.jɛ du/"
    }
  ],
  "word": "billet doux"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "billet-doux",
            "bor": "1"
          },
          "expansion": "→ English: billet-doux",
          "name": "desc"
        }
      ],
      "text": "→ English: billet-doux"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "de",
            "2": "Billetdoux",
            "bor": "1"
          },
          "expansion": "→ German: Billetdoux",
          "name": "desc"
        }
      ],
      "text": "→ German: Billetdoux"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "sweet note"
      },
      "expansion": "“sweet note”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "sweet note"
      },
      "expansion": "Literally, “sweet note”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “sweet note”.",
  "forms": [
    {
      "form": "billets doux",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "billet doux m (plural billets doux)",
      "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",
        "French terms with quotations",
        "Pages with 1 entry"
      ],
      "examples": [
        {
          "english": "What's left of the billets-doux / Of the months of April, the appointments / A memory that pursues me / Unceasingly",
          "ref": "1942, “Que reste-t-il de nos amours ?”, Charles Trenet (lyrics), Léo Chauliac (music)",
          "text": "Que reste-t-il des billets doux / Des mois d’avril, des rendez-vous / Un souvenir qui me poursuit / Sans cesse",
          "type": "quotation"
        }
      ],
      "glosses": [
        "billet-doux"
      ],
      "links": [
        [
          "billet-doux",
          "billet-doux"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/bi.jɛ du/"
    }
  ],
  "word": "billet doux"
}