: a fortified place : stronghold
especially
: a large and permanent fortification sometimes including a town
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
Cold Connection Iceland is a floating fortress of volcanoes.
—
Quanta Magazine, 27 Mar. 2026
When a crew member is found dead and another goes missing, military investigators board the floating fortress, with its 2,000-strong crew and nuclear payload, to hunt for the truth before the murder becomes a global security crisis.
—Scott Roxborough, HollywoodReporter, 24 Mar. 2026
One focus of Russian attacks has been the town of Lyman in Donetsk, at the edge of what’s known as Ukraine’s fortress belt in the region, and a key strongpoint guarding the larger city of Sloviansk.
—Tim Lister, CNN Money, 22 Mar. 2026
As the publication notes, visitors can explore landmarks like the Castillo de San Marcos National Monument — a 17th-century fortress that brings Spanish colonial history to life.
—Doris Alvarez Cea, Florida Times-Union, 20 Mar. 2026
See All Example Sentences for fortress
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Quanta Magazine, 27 Mar. 2026
When a crew member is found dead and another goes missing, military investigators board the floating fortress, with its 2,000-strong crew and nuclear payload, to hunt for the truth before the murder becomes a global security crisis.
—Scott Roxborough, HollywoodReporter, 24 Mar. 2026
One focus of Russian attacks has been the town of Lyman in Donetsk, at the edge of what’s known as Ukraine’s fortress belt in the region, and a key strongpoint guarding the larger city of Sloviansk.
—Tim Lister, CNN Money, 22 Mar. 2026
As the publication notes, visitors can explore landmarks like the Castillo de San Marcos National Monument — a 17th-century fortress that brings Spanish colonial history to life.
—Doris Alvarez Cea, Florida Times-Union, 20 Mar. 2026
See All Example Sentences for fortress
Cite this Entry
“Fortress.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fortress. Accessed 29 Mar. 2026.
Copy CitationKids Definition
fortress
noun
for·tress
ˈfȯr-trəs 
: a fortified place
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