fortress

noun

for·​tress ˈfȯr-trəs 

: a fortified place : stronghold

especially : a large and permanent fortification sometimes including a town

fortresslike

ˈfȯr-trəs-līk 

adjective

Synonyms of fortress

• stronghold
• citadel
• fortification
• castle
• bastion
• fort

Examples of fortress in a Sentence

the boys built a snow fortress and then challenged the neighborhood kids to an in-your-face snowball fight

Recent Examples on the Web

Another day trip option is the hilltop town of Erice, where there's a medieval fortress that's over 2,500 years old. — Megan Rose Murray, Condé Nast Traveler, 22 Aug. 2026

Cage plays Roy, a gifted con artist with obsessive-compulsive disorder whose tics, phobias and elaborate rituals have turned his immaculate home into a fortress against the world. — Los Angeles Times, 20 Aug. 2026

Dewey shared that the Renaissance Center that was built in the 1970s was created to be a fortress, strictly for workers not in the community. — Julia Avant, CBS News, 19 Aug. 2026

Chalk it up to the leftover hubris of late-20th-century American empire and the grand illusion of a liberated civilization thriving behind an impenetrable fortress. — Andy Andersen, Vulture, 16 Aug. 2026

Word History

Etymology

Middle English forteresse, from Anglo-French fortelesce, forteresse, from Medieval Latin fortalitia, from Latin fortis strong

First Known Use

14th century, in the meaning defined above

Kids Definition

fortress

noun

for·​tress ˈfȯr-trəs 

: a fortified place