"bump cap" meaning in English

{
  "forms": [
    {
      "form": "bump caps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bump cap (plural bump caps)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A hard hat."
      ],
      "id": "en-bump_cap-en-noun-5VQ2UvAb",
      "links": [
        [
          "hard hat",
          "hard hat"
        ]
      ],
      "raw_glosses": [
        "(UK) A hard hat."
      ],
      "tags": [
        "UK"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "26 74",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "10 90",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "8 92",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "15 85",
          "kind": "topical",
          "langcode": "en",
          "name": "Headwear",
          "orig": "en:Headwear",
          "parents": [
            "Clothing",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A form of baseball cap."
      ],
      "id": "en-bump_cap-en-noun-Y12eJdPL",
      "links": [
        [
          "baseball cap",
          "baseball cap"
        ]
      ],
      "raw_glosses": [
        "(US) A form of baseball cap."
      ],
      "synonyms": [
        {
          "_dis1": "0 100",
          "word": "construction helmet"
        },
        {
          "_dis1": "0 100",
          "word": "hard hat"
        }
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "wikipedia": [
    "bump cap"
  ],
  "word": "bump cap"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries",
    "en:Headwear"
  ],
  "forms": [
    {
      "form": "bump caps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bump cap (plural bump caps)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English"
      ],
      "glosses": [
        "A hard hat."
      ],
      "links": [
        [
          "hard hat",
          "hard hat"
        ]
      ],
      "raw_glosses": [
        "(UK) A hard hat."
      ],
      "tags": [
        "UK"
      ]
    },
    {
      "categories": [
        "American English"
      ],
      "glosses": [
        "A form of baseball cap."
      ],
      "links": [
        [
          "baseball cap",
          "baseball cap"
        ]
      ],
      "raw_glosses": [
        "(US) A form of baseball cap."
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "construction helmet"
    },
    {
      "word": "hard hat"
    }
  ],
  "wikipedia": [
    "bump cap"
  ],
  "word": "bump cap"
}