security service

se·cu·ri·ty ser·vice
Australia, UK/sɪˌkjʊə̯.ɪ.tiː ˈsɜː.vɪs/Australia, UK/sɪˌkjɔː-/Canada, US/sɪˌkjʊɹ.ɪ.ti ˈsɜɹ.vɪs/New Zealand/səˌkjʉ(ː)ə̯.ə.tiː ˈsøː.vəs/

noun

A government organization established to protect its nation and its secrets from enemies.

Similar
MIMilitary Intelligence Section 5
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Meanings

security service1

nounsecurity service (plural security services)

plural security services

  1. A government organization established to protect its nation and its secrets from enemies.
  2. Used other than figuratively or idiomatically: see security, service.

Security Service2

proper nounthe Security Service
  1. UKformalMI5.

    In this section […] “intelligence service” means the Security Service, the Secret Intelligence Service or GCHQ […]

    2010, Parliament of the United Kingdom, “Other provisions about offences, section 13(6)”, in Bribery Act 2010, page 11

Synonyms & antonyms

nounthe government agency in the United Kingdom that is responsible for internal security and counterintelligence on British territory

Similar
MIMilitary Intelligence Section 5
Broader
international intelligence agency
Also see
fivemimi5

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

Chinese Mandarin 國家安全機構 /国家安全机构
  • 國家安全機構 /国家安全机构 (guójiā ānquán jīgòu)government organization
Czech zpravodajská služba
  • zpravodajská službagovernment organization
Dutch Geheime dienst
  • Geheime dienstgovernment organization
Finnish suojelupoliisi, turvallisuuspalvelu
  • suojelupoliisigovernment organization
  • turvallisuuspalvelugovernment organization
French service de sécurité
  • service de sécuritégovernment organization
German Sicherheitsdienst
  • Sicherheitsdienstgovernment organization
Hungarian elhárítás, titkosszolgálat
  • elhárításgovernment organization
  • titkosszolgálatgovernment organization
  • nemzetbiztonsági szolgálatgovernment organization
Italian servizio segreto
  • servizio segretogovernment organization
Japanese セキュリティー·サービス, 保安部
  • セキュリティー·サービス (sekyuritī-sābisu)government organization
  • 保安部 (hoanbu)government organization
Polish służba bezpieczeństwa
  • służba bezpieczeństwagovernment organization
Portuguese agência de segurança
  • agência de segurançagovernment organization
Russian слу́жба безопа́сности
  • слу́жба безопа́сности (slúžba bezopásnosti)government organization
Spanish servicio de seguridad
  • servicio de seguridadgovernment organization
Swedish säkerhetstjänst
  • säkerhetstjänstgovernment organization
Cite this entry
APA

security service. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/security%20service

MLA

“security service.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/security%20service. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “security service,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/security%20service.

Source: security service on Wiktionary, CC BY-SA 4.0.