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Synonyms

fortress

American  
[fawr-tris] / ˈfɔr trɪs /

noun

  1. a large fortified place; a fort or group of forts, often including a town; citadel.

  2. any place of exceptional security; stronghold.


fortress British  
/ ˈfɔːtrɪs /

noun

  1. a large fort or fortified town

  2. a place or source of refuge or support

"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

verb

  1. (tr) to protect with or as if with a fortress

"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 fortress

1300–50; Middle English forteresse < Old French < Vulgar Latin *fortaricia (compare Medieval Latin fortalitia ), equivalent to Latin fort ( is ) strong + -ar-, formative of uncertain meaning +- icia -ice

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.

That is, Berkshire’s fortress balance sheet and its durable earnings make it more valuable in times of stress or chaos, since it can deploy capital when others are constrained.

From Barron's • Mar. 28, 2026

On Tuesday night, at the fortress of soccer giant Inter Milan, the Norwegians pulled off their most surprising victory yet.

From The Wall Street Journal • Feb. 25, 2026

The Maduros tried to escape into a safe place, the US president explained, describing it as a military "fortress".

From BBC • Jan. 4, 2026

Companies are creating cash cushions — also known as fortress balance sheets — to protect themselves from a possible downturn.

From Los Angeles Times • Jan. 1, 2026

He could understand why Achren’s fortress was called Spiral Castle.

From "The Book of Three" by Lloyd Alexander