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FSB

British

abbreviation

the Russian Federal Security Service, founded in 1995

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of FSB

C20: Russian Federalnaya sluzhba bezopasnosti

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The diplomat was ordered to leave Russia within two weeks, the FSB said.

From Barron's • Mar. 30, 2026

The FSB claims the diplomat "intentionally provided false information" when obtaining a permit to enter Russia, and that there were "signs of intelligence activities" detected, according to state news agency Tass.

From BBC • Mar. 30, 2026

Moran's president, Vyacheslav Kalashnikov, is a retired FSB lieutenant colonel, according to the Warsaw Institute, a Polish think tank.

From Barron's • Feb. 23, 2026

She advised any businesses struggling to contact their local authority or the FSB for support, but added that a number of funding schemes were due to end on 31 March.

From BBC • Feb. 1, 2026

The FSB ordered Kaliningrad customs to prohibit bulk exports of Stolichnaya.

From Russian Roulette: Russia's Economy in Putin's Era by Vaknin, Samuel

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023