"bouteille à la mer" meaning in French

{
  "forms": [
    {
      "form": "bouteilles à la mer",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "bouteille à la mer f (plural bouteilles à la mer)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "message in a bottle"
      ],
      "id": "en-bouteille_à_la_mer-fr-noun-G5E53xrv",
      "links": [
        [
          "message in a bottle",
          "message in a bottle"
        ]
      ],
      "tags": [
        "feminine"
      ]
    },
    {
      "categories": [
        {
          "_dis": "8 92",
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "13 87",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "7 93",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "english": "to send out an SOS",
          "text": "lancer une bouteille à la mer, jeter une bouteille à la mer",
          "type": "example"
        }
      ],
      "glosses": [
        "desperate cry for help, SOS; hopeless attempt, last-ditch attempt"
      ],
      "id": "en-bouteille_à_la_mer-fr-noun-Bjeetb~1",
      "links": [
        [
          "desperate",
          "desperate"
        ],
        [
          "cry for help",
          "cry for help"
        ],
        [
          "SOS",
          "SOS"
        ],
        [
          "hopeless",
          "hopeless"
        ],
        [
          "last-ditch",
          "last ditch"
        ]
      ],
      "raw_glosses": [
        "(figurative) desperate cry for help, SOS; hopeless attempt, last-ditch attempt"
      ],
      "tags": [
        "feminine",
        "figuratively"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/bu.tɛj a la mɛʁ/"
    },
    {
      "audio": "LL-Q150 (fra)-LoquaxFR-bouteille à la mer.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/00/LL-Q150_%28fra%29-LoquaxFR-bouteille_%C3%A0_la_mer.wav/LL-Q150_%28fra%29-LoquaxFR-bouteille_%C3%A0_la_mer.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/00/LL-Q150_%28fra%29-LoquaxFR-bouteille_%C3%A0_la_mer.wav/LL-Q150_%28fra%29-LoquaxFR-bouteille_%C3%A0_la_mer.wav.ogg"
    }
  ],
  "word": "bouteille à la mer"
}

{
  "categories": [
    "French countable nouns",
    "French entries with incorrect language header",
    "French feminine nouns",
    "French lemmas",
    "French multiword terms",
    "French nouns",
    "French nouns with red links in their headword lines",
    "French terms with IPA pronunciation",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "bouteilles à la mer",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "bouteille à la mer f (plural bouteilles à la mer)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "message in a bottle"
      ],
      "links": [
        [
          "message in a bottle",
          "message in a bottle"
        ]
      ],
      "tags": [
        "feminine"
      ]
    },
    {
      "categories": [
        "French terms with usage examples"
      ],
      "examples": [
        {
          "english": "to send out an SOS",
          "text": "lancer une bouteille à la mer, jeter une bouteille à la mer",
          "type": "example"
        }
      ],
      "glosses": [
        "desperate cry for help, SOS; hopeless attempt, last-ditch attempt"
      ],
      "links": [
        [
          "desperate",
          "desperate"
        ],
        [
          "cry for help",
          "cry for help"
        ],
        [
          "SOS",
          "SOS"
        ],
        [
          "hopeless",
          "hopeless"
        ],
        [
          "last-ditch",
          "last ditch"
        ]
      ],
      "raw_glosses": [
        "(figurative) desperate cry for help, SOS; hopeless attempt, last-ditch attempt"
      ],
      "tags": [
        "feminine",
        "figuratively"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/bu.tɛj a la mɛʁ/"
    },
    {
      "audio": "LL-Q150 (fra)-LoquaxFR-bouteille à la mer.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/00/LL-Q150_%28fra%29-LoquaxFR-bouteille_%C3%A0_la_mer.wav/LL-Q150_%28fra%29-LoquaxFR-bouteille_%C3%A0_la_mer.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/00/LL-Q150_%28fra%29-LoquaxFR-bouteille_%C3%A0_la_mer.wav/LL-Q150_%28fra%29-LoquaxFR-bouteille_%C3%A0_la_mer.wav.ogg"
    }
  ],
  "word": "bouteille à la mer"
}