"service academy" meaning in English

{
  "etymology_links": [
    [
      "service",
      "service#English"
    ],
    [
      "academy",
      "academy#English"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "service",
        "3": "academy"
      },
      "expansion": "service + academy",
      "name": "compound"
    }
  ],
  "etymology_text": "From service + academy.",
  "forms": [
    {
      "form": "service academies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "service academy (plural service academies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Military",
          "orig": "en:Military",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A postsecondary school that prepares its students for military service as an officer."
      ],
      "id": "en-service_academy-en-noun-a-1-bY4y",
      "links": [
        [
          "postsecondary",
          "postsecondary"
        ]
      ],
      "synonyms": [
        {
          "word": "military academy"
        }
      ]
    }
  ],
  "word": "service academy"
}

{
  "etymology_links": [
    [
      "service",
      "service#English"
    ],
    [
      "academy",
      "academy#English"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "service",
        "3": "academy"
      },
      "expansion": "service + academy",
      "name": "compound"
    }
  ],
  "etymology_text": "From service + academy.",
  "forms": [
    {
      "form": "service academies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "service academy (plural service academies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "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:Military"
      ],
      "glosses": [
        "A postsecondary school that prepares its students for military service as an officer."
      ],
      "links": [
        [
          "postsecondary",
          "postsecondary"
        ]
      ],
      "synonyms": [
        {
          "word": "military academy"
        }
      ]
    }
  ],
  "word": "service academy"
}