"red hat" meaning in English

{
  "etymology_text": "From the red band on the caps they wore.",
  "forms": [
    {
      "form": "red hats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "red hat (plural red hats)",
      "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": "Military",
          "orig": "en:Military",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Military ranks",
          "orig": "en:Military ranks",
          "parents": [
            "Military",
            "Positions of authority",
            "Titles",
            "Society",
            "Leaders",
            "Occupations",
            "People",
            "All topics",
            "Work",
            "Human",
            "Fundamental",
            "Human activity",
            "Human behaviour"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A senior army officer."
      ],
      "id": "en-red_hat-en-noun-ktqbYPZm",
      "links": [
        [
          "military",
          "military"
        ],
        [
          "senior",
          "senior"
        ],
        [
          "army",
          "army"
        ],
        [
          "officer",
          "officer"
        ]
      ],
      "raw_glosses": [
        "(UK, military, slang) A senior army officer."
      ],
      "tags": [
        "UK",
        "slang"
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "word": "red hat"
}

{
  "etymology_text": "From the red band on the caps they wore.",
  "forms": [
    {
      "form": "red hats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "red hat (plural red hats)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Military",
        "en:Military ranks"
      ],
      "glosses": [
        "A senior army officer."
      ],
      "links": [
        [
          "military",
          "military"
        ],
        [
          "senior",
          "senior"
        ],
        [
          "army",
          "army"
        ],
        [
          "officer",
          "officer"
        ]
      ],
      "raw_glosses": [
        "(UK, military, slang) A senior army officer."
      ],
      "tags": [
        "UK",
        "slang"
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "word": "red hat"
}