"vapour trail" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "vapour",
        "3": "trail"
      },
      "expansion": "vapour + trail",
      "name": "compound"
    }
  ],
  "etymology_text": "From vapour + trail.",
  "forms": [
    {
      "form": "vapour trails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vapour trail (plural vapour trails)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English 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": "en",
          "name": "Clouds",
          "orig": "en:Clouds",
          "parents": [
            "Atmospheric phenomena",
            "Atmosphere",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A contrail."
      ],
      "id": "en-vapour_trail-en-noun-hy8ppvHl",
      "links": [
        [
          "contrail",
          "contrail"
        ]
      ],
      "raw_glosses": [
        "(British) A contrail."
      ],
      "synonyms": [
        {
          "tags": [
            "US"
          ],
          "word": "vapor trail"
        }
      ],
      "tags": [
        "British"
      ]
    }
  ],
  "word": "vapour trail"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "vapour",
        "3": "trail"
      },
      "expansion": "vapour + trail",
      "name": "compound"
    }
  ],
  "etymology_text": "From vapour + trail.",
  "forms": [
    {
      "form": "vapour trails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vapour trail (plural vapour trails)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Clouds"
      ],
      "glosses": [
        "A contrail."
      ],
      "links": [
        [
          "contrail",
          "contrail"
        ]
      ],
      "raw_glosses": [
        "(British) A contrail."
      ],
      "tags": [
        "British"
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "US"
      ],
      "word": "vapor trail"
    }
  ],
  "word": "vapour trail"
}