"vapour trail" meaning in English

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      "expansion": "vapour + trail",
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  "etymology_text": "vapour + trail",
  "forms": [
    {
      "form": "vapour trails",
      "tags": [
        "plural"
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      "expansion": "vapour trail (plural vapour trails)",
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  "lang_code": "en",
  "pos": "noun",
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          "name": "British English",
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      "glosses": [
        "A contrail."
      ],
      "id": "en-vapour_trail-en-noun-hy8ppvHl",
      "links": [
        [
          "contrail",
          "contrail"
        ]
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      "raw_glosses": [
        "(British) A contrail."
      ],
      "synonyms": [
        {
          "tags": [
            "US"
          ],
          "word": "vapor trail"
        }
      ],
      "tags": [
        "British"
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    }
  ],
  "word": "vapour trail"
}

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      "expansion": "vapour + trail",
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  ],
  "etymology_text": "vapour + trail",
  "forms": [
    {
      "form": "vapour trails",
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        "plural"
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      "expansion": "vapour trail (plural vapour trails)",
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  "lang_code": "en",
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        "A contrail."
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        "(British) A contrail."
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      "word": "vapor trail"
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  "word": "vapour trail"
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