"pilot jacket" meaning in English

{
  "etymology_text": "So called because it was worn by seamen.",
  "forms": [
    {
      "form": "pilot jackets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pilot jacket (plural pilot jackets)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "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": "Clothing",
          "orig": "en:Clothing",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "pilot-jacketed"
        }
      ],
      "examples": [
        {
          "ref": "1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC:",
          "text": "The door was opened by an odd, swarthy, dried-up person of uncertain age, with a dark pilot jacket and brown leather gaiters.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A pea coat."
      ],
      "id": "en-pilot_jacket-en-noun-x5CIfY~P",
      "links": [
        [
          "pea coat",
          "pea coat"
        ]
      ]
    }
  ],
  "word": "pilot jacket"
}

{
  "derived": [
    {
      "word": "pilot-jacketed"
    }
  ],
  "etymology_text": "So called because it was worn by seamen.",
  "forms": [
    {
      "form": "pilot jackets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pilot jacket (plural pilot jackets)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Clothing"
      ],
      "examples": [
        {
          "ref": "1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC:",
          "text": "The door was opened by an odd, swarthy, dried-up person of uncertain age, with a dark pilot jacket and brown leather gaiters.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A pea coat."
      ],
      "links": [
        [
          "pea coat",
          "pea coat"
        ]
      ]
    }
  ],
  "word": "pilot jacket"
}