"Security Service" meaning in English

{
  "forms": [
    {
      "form": "the Security Service",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "Security Service"
      },
      "expansion": "the Security Service",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "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": "Espionage",
          "orig": "en:Espionage",
          "parents": [
            "Deception",
            "Secrecy",
            "Security",
            "Ethics",
            "Human behaviour",
            "Society",
            "Philosophy",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2010, Parliament of the United Kingdom, “Other provisions about offences, section 13(6)”, in Bribery Act 2010, page 11:",
          "text": "In this section […] “intelligence service” means the Security Service, the Secret Intelligence Service or GCHQ […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "MI5."
      ],
      "id": "en-Security_Service-en-name-STC8EAI9",
      "links": [
        [
          "MI5",
          "MI5"
        ]
      ],
      "raw_glosses": [
        "(UK, formal) MI5."
      ],
      "tags": [
        "UK",
        "formal"
      ]
    }
  ],
  "word": "Security Service"
}

{
  "forms": [
    {
      "form": "the Security Service",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "Security Service"
      },
      "expansion": "the Security Service",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "British English",
        "English entries with incorrect language header",
        "English formal terms",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Espionage"
      ],
      "examples": [
        {
          "ref": "2010, Parliament of the United Kingdom, “Other provisions about offences, section 13(6)”, in Bribery Act 2010, page 11:",
          "text": "In this section […] “intelligence service” means the Security Service, the Secret Intelligence Service or GCHQ […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "MI5."
      ],
      "links": [
        [
          "MI5",
          "MI5"
        ]
      ],
      "raw_glosses": [
        "(UK, formal) MI5."
      ],
      "tags": [
        "UK",
        "formal"
      ]
    }
  ],
  "word": "Security Service"
}