FSB

F4S1B3

proper noun

The Federal Security Service of the Russian Federation.

Similar
Federal Security BureauFederal Security Servicefederal savings bank
Less commonScrabble 8

Meanings

FSB1

nounFSB (plural FSBs)

plural FSBs

  1. abbreviationinitialismcomputingInitialism of front-side bus.
proper noun
  1. abbreviationinitialismInitialism of Federation of Small Businesses.
  2. abbreviationinitialismInitialism of Fire Support Base

FSB2

proper noun
  1. RussiainitialismespionageThe Federal Security Service of the Russian Federation.

    Possible victims included Roman Tsepov, Putin’s bodyguard in 1990s St Petersburg, who died after drinking tea in 2004 at a local FSB office.

    2020 August 20, Luke Harding, “Alexei Navalny and the long history of poisoned Kremlin critics”, in The Guardian
    1 more example

    Krasikov, a former high-ranking FSB colonel serving a life sentence in a German prison, was on the top of Moscow’s list of Russian prisoners it wanted to exchange.

    2024 August 1, Ivana Kottasová and Anna Chernova, “Who was freed in major prisoner swap between Russia and the West?”, in CNN

Synonyms & antonyms

nounthe internal counterintelligence agency of the Russian Federation and successor to the Soviet KGB; formerly led by Vladimir Putin

Similar
Federal Security BureauFederal Security Service
Broader
Russian agency

nouna federally chartered savings bank

Similar
federal savings bank
Also see

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. RussianФСБ
  2. EnglishFSB

From Russian ФСБ (FSB), initialism of Федеральная Служба Безопасности (Federalʹnaja Služba Bezopasnosti, “Federal Security Service”).

Full word history & related roots →

Translations

Chinese Mandarin 俄聯邦安全局 /俄联邦安全局
  • 俄聯邦安全局 /俄联邦安全局 (Éliánbāng ānquán jú)Russian FSB
Hebrew פס״ב
  • פס״ב (FSB)Russian FSB
Polish FSB
  • FSBRussian FSB
Russian ФСБ
  • ФСБ (FSB)Russian FSB
Ukrainian ФСБ
  • ФСБ (FSB)Russian FSB
Cite this entry
APA

FSB. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/FSB

MLA

“FSB.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/FSB. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “FSB,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/FSB.

Source: FSB on Wiktionary, CC BY-SA 4.0.