"postmaster general" meaning in English

{
  "forms": [
    {
      "form": "postmaster generals",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "postmasters general",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "s",
        "2": "postmasters general"
      },
      "expansion": "postmaster general (plural postmaster generals or postmasters general)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Postmaster General"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
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          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms where the adjective follows the noun",
          "parents": [
            "Terms where the adjective follows the noun",
            "Terms by orthographic property",
            "Terms by lexical property"
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          "source": "w"
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          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
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          "source": "w"
        }
      ],
      "glosses": [
        "Alternative letter-case form of Postmaster General"
      ],
      "id": "en-postmaster_general-en-noun-IcVruDrE",
      "links": [
        [
          "Postmaster General",
          "Postmaster General#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "postmaster general"
}

{
  "forms": [
    {
      "form": "postmaster generals",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "postmasters general",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "s",
        "2": "postmasters general"
      },
      "expansion": "postmaster general (plural postmaster generals or postmasters general)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Postmaster General"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms where the adjective follows the noun",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "Alternative letter-case form of Postmaster General"
      ],
      "links": [
        [
          "Postmaster General",
          "Postmaster General#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "postmaster general"
}