"arrière-train" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "arrière-",
        "3": "train"
      },
      "expansion": "arrière- + train",
      "name": "af"
    }
  ],
  "etymology_text": "From arrière- + train.",
  "forms": [
    {
      "form": "arrière-trains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "arrière-train m (plural arrière-trains)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "the rear of a train, or 4x4 vehicle"
      ],
      "id": "en-arrière-train-fr-noun-66P~mPpz",
      "links": [
        [
          "rear",
          "rear"
        ],
        [
          "train",
          "train"
        ],
        [
          "4x4",
          "4x4"
        ]
      ],
      "tags": [
        "masculine"
      ]
    },
    {
      "categories": [
        {
          "_dis": "1 53 45",
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          "source": "w+disamb"
        },
        {
          "_dis": "8 49 43",
          "kind": "other",
          "name": "French terms prefixed with arrière-",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "2 54 44",
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      ],
      "examples": [
        {
          "english": "The dog […] didn't have a tail, so it wagged its hindquarters to show it was happy.",
          "ref": "2016, Gaël Faye, Petit Pays [Small Country]:",
          "text": "Le chien[…] n’avait pas de queue, alors il remuait l’arrière-train pour signifier qu’il était content.",
          "type": "quote"
        }
      ],
      "glosses": [
        "hindquarters (of an animal)"
      ],
      "id": "en-arrière-train-fr-noun-SpfE5HMF",
      "links": [
        [
          "hindquarter",
          "hindquarter"
        ]
      ],
      "tags": [
        "masculine"
      ]
    },
    {
      "categories": [
        {
          "_dis": "1 53 45",
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          "parents": [
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          "source": "w+disamb"
        },
        {
          "_dis": "8 49 43",
          "kind": "other",
          "name": "French terms prefixed with arrière-",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "2 54 44",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "caboose, posterior, hindquarters (buttocks of a human)"
      ],
      "id": "en-arrière-train-fr-noun-LphujYE~",
      "links": [
        [
          "caboose",
          "caboose"
        ],
        [
          "posterior",
          "posterior"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/a.ʁjɛʁ.tʁɛ̃/"
    },
    {
      "audio": "LL-Q150 (fra)-Lyokoï-arrière-train.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/ed/LL-Q150_%28fra%29-Lyoko%C3%AF-arri%C3%A8re-train.wav/LL-Q150_%28fra%29-Lyoko%C3%AF-arri%C3%A8re-train.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/ed/LL-Q150_%28fra%29-Lyoko%C3%AF-arri%C3%A8re-train.wav/LL-Q150_%28fra%29-Lyoko%C3%AF-arri%C3%A8re-train.wav.ogg"
    }
  ],
  "word": "arrière-train"
}

{
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    "French countable nouns",
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    "French masculine nouns",
    "French multiword terms",
    "French nouns",
    "French terms prefixed with arrière-",
    "French terms with IPA pronunciation",
    "Pages with 1 entry",
    "Pages with entries"
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  "etymology_templates": [
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      "args": {
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        "2": "arrière-",
        "3": "train"
      },
      "expansion": "arrière- + train",
      "name": "af"
    }
  ],
  "etymology_text": "From arrière- + train.",
  "forms": [
    {
      "form": "arrière-trains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "arrière-train m (plural arrière-trains)",
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  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "the rear of a train, or 4x4 vehicle"
      ],
      "links": [
        [
          "rear",
          "rear"
        ],
        [
          "train",
          "train"
        ],
        [
          "4x4",
          "4x4"
        ]
      ],
      "tags": [
        "masculine"
      ]
    },
    {
      "categories": [
        "French terms with quotations"
      ],
      "examples": [
        {
          "english": "The dog […] didn't have a tail, so it wagged its hindquarters to show it was happy.",
          "ref": "2016, Gaël Faye, Petit Pays [Small Country]:",
          "text": "Le chien[…] n’avait pas de queue, alors il remuait l’arrière-train pour signifier qu’il était content.",
          "type": "quote"
        }
      ],
      "glosses": [
        "hindquarters (of an animal)"
      ],
      "links": [
        [
          "hindquarter",
          "hindquarter"
        ]
      ],
      "tags": [
        "masculine"
      ]
    },
    {
      "glosses": [
        "caboose, posterior, hindquarters (buttocks of a human)"
      ],
      "links": [
        [
          "caboose",
          "caboose"
        ],
        [
          "posterior",
          "posterior"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
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      "ipa": "/a.ʁjɛʁ.tʁɛ̃/"
    },
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      "audio": "LL-Q150 (fra)-Lyokoï-arrière-train.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/ed/LL-Q150_%28fra%29-Lyoko%C3%AF-arri%C3%A8re-train.wav/LL-Q150_%28fra%29-Lyoko%C3%AF-arri%C3%A8re-train.wav.mp3",
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    }
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  "word": "arrière-train"
}