bastion

noun

bas·​tion ˈbas-chən 

1

: a projecting part of a fortification

a bastion at each of the fort's five corners

2

: a fortified area or position

bombing island bastions

3

: stronghold sense 2

the last bastion of academic standards

—Amer. Scientist

bastioned

ˈbas-chənd 

adjective

Did you know?

Bastion today usually refers to a metaphorical fortress, a place where an idea, ethos, philosophy, culture, etc. is in some way protected and able to endure. But its oldest meaning concerned literal fortifications and strongholds. Bastion likely traces back to a verb, bastir, meaning “to build or weave,” from Old Occitan, a Romance language spoken in southern France from about 1100 to 1500. Bastir eventually led to bastia, an Italian word for a small quadrangular fortress, and from there bastione, referring to a part of a fortified structure—such as an outer wall—that juts or projects outward. Bastione became bastion in Middle French before entering English with the same meaning. You may be familiar with another bastir descendent, bastille, which refers generically to a prison or jail, but is best known as the name of the Parisian fortress-turned-prison stormed by an angry mob at the start of the French Revolution; the Bastille’s fall is commemorated in France by the national holiday Bastille Day.

Synonyms

• stronghold
• fortress
• citadel
• fortification
• castle

Examples of bastion in a Sentence

the rebel army retreated to its bastion in the mountains to regroup

Recent Examples on the Web

Consider San Francisco, a former bastion of the state’s far-left. —Douglas Schoen, Oc Register, 13 July 2025

In June, the U.N. said, more than 147,000 people fled their homes in the central region, once a bastion of safety for those trying to escape the horrors of the capital. —Jacqueline Charles july 11, Miami Herald, 11 July 2025

Also in southern Spain, Granada is, like Seville, a bastion of architectural and historical wonders, chief among them the Alhambra palace, one of the world’s most incredible fortresses. —Paul Brady, Travel + Leisure, 8 July 2025

His competition, Mays, is a 26-year-old bastion of versatility who has had two separate stints with the Panthers to date. —Charlotte Observer, 7 July 2025

Word History

Etymology

borrowed from Middle French, borrowed from Italian bastione, from bastia "small quadrangular fortress" (from an Upper Italian counterpart to Tuscan bastita, from feminine past participle of bastire "to build," probably borrowed from Old Occitan bastir "to weave, build," or its Gallo-Romance ancestor) + -one, augmentative suffix (going back to Latin -ō, -ōn-, suffix of nouns denoting persons with a prominent feature) — more at bastille

First Known Use

1546, in the meaning defined at sense 1

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Kids Definition

bastion

noun

bas·​tion ˈbas-chən 

: some place or something that gives protection against attack

a bastion of democracy