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bulwark

American  
[bool-werk, -wawrk, buhl-] / ˈbʊl wərk, -wɔrk, ˈbʌl- /

noun

  1. a wall of earth or other material built for defense; rampart.

  2. any protection against external danger, injury, or annoyance.

    The new dam was a bulwark against future floods.

  3. any person or thing giving strong support or encouragement in time of need, danger, or doubt.

    Religion was his bulwark.

    Synonyms:
    mainstay, buttress, support
  4. Nautical. Usually bulwarks. a solid wall enclosing the perimeter of a weather or main deck for the protection of persons or objects on deck.


verb (used with object)

  • bulwarks,
    present (3rd person singular)
  • bulwarked,
    past participle,  past
  • bulwarking
    present participle
  1. to fortify or protect with a bulwark; secure by or as if by a fortification.

bulwark British  
/ ˈbʊlwək /

noun

  1. a wall or similar structure used as a fortification; rampart

  2. a person or thing acting as a defence against injury, annoyance, etc

  3. (often plural) nautical a solid vertical fencelike structure along the outward sides of a deck

  4. a breakwater or mole

"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 defend or fortify with or as if with a bulwark

"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

Other Word Forms

Inflected Forms

Participles

Conjugated Forms

Present

Past

Future


Etymology

Origin of bulwark

1375–1425; late Middle English bulwerk, probably < Middle Dutch bolwerc, equivalent to bol ( l ) e bole 1 + werk work (noun); cf. boulevard


Explanation

A bulwark is a wall built for protection or defense. If you and your pals build a secret fort for girls only, you might want to build a bulwark to surround it — with a "No Boys Allowed" sign posted prominently. A seawall that runs perpendicular to the shore is sometimes called a bulwark, because it defends the beach, not against invaders, but against beach erosion. Although the noun bulwark can refer to any fortified wall, it often specifically refers to an earthen wall, like a rampart. As a verb, bulwark means to fortify with a wall or to provide protection: "The volunteers used sandbags to bulwark the levee in an attempt to prevent the flooded river from overflowing its banks."

Keep Reading on Vocabulary.com

Vocabulary lists containing bulwark

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.

See Examples For:

Death imagery as a bulwark against fear of death is so well known that it is covered under the psychological umbrella of Terror Management Theory as a coping mechanism.

From Slate ● Jul. 10, 2026

“This might be a record here,” Hathaway tells the crowd near the end of the song, and so it was — a document of adaptation, a testament to borrowing, a bulwark against pretty fictions.

From Los Angeles Times ● Jun. 30, 2026

Zinat-un-Nisa was a powerful political actor and an "extraordinarily influential and important political bulwark for her ageing and politically vulnerable" father toward the end of his life.

From BBC ● Jun. 27, 2026

Increasingly Pacific nations understand that defense spending is more than a necessary bulwark of national security.

From The Wall Street Journal ● Jun. 1, 2026

At the agency’s inception, scientists had hoped it would serve as a civilian bulwark against military monopolization of nuclear research.

From "Big Science" by Michael Hiltzik

My earlier analysis pointed to the three bulwarks against attempted election subversion—the state and local governments that administer elections, the courts that protect rights, and the American people who are democracy’s ultimate safeguard.

From Slate ● Oct. 5, 2026

Their purpose is the opposite: to preserve and protect; to create bulwarks of predictability amid the chaos of the markets.

From The Wall Street Journal ● Jun. 8, 2026

Forests could also be potential bulwarks against climate change.

From Science Daily ● Apr. 10, 2024

Political parties with his backing continued to win elections but were forced from power several times by the courts and the army, both bulwarks of royalism.

From Washington Times ● Sep. 1, 2023

Instead of surging over the bulwarks and exploding in the captain’s face, it ricocheted off the ship’s side and went straight into the Pacific, where it died with a hiss.

From "Life of Pi" by Yann Martel

The valuations are bulwarked by new information from Cerebras’s pre-IPO filings with the SEC showing company revenue grew 76% between 2024 and 2025 to $510 million.

From The Wall Street Journal ● Apr. 27, 2026

Presidential blue-ribbon panels bulwarked the Social Security program in 1983 and overhauled NASA’s space shuttle program after the 1986 Challenger disaster.

From Scientific American ● Feb. 24, 2023

Even Einstein, the prototypical loner, was bulwarked by a vast correspondence of arguing and discussion.

From New York Times ● Oct. 31, 2016

He didn't say that the British way is better, cleaner, more constitutionally bulwarked – because, actually, it isn't.

From The Guardian ● Aug. 28, 2010

Did not fair return from honest toil mean that he could face John Barrett, bulwarked by his millions?

From King Spruce, A Novel by Holman Day

The lesson wasn’t about which class of stocks is safer, but rather that diversification means not only bulwarking your portfolio against downturns but also enhancing your chances of long-term success.

From The Wall Street Journal ● Oct. 3, 2026

In addition to bulwarking security, many are bunkering from reporters who have descended on a normally sleepy community.

From Washington Post ● Jan. 9, 2023

On the DDoS front, the companies involved are doubtless bolstering their defenses, but bulwarking for brute force denial of service attacks is an ongoing process, and there’s no panacea.

From Time ● Aug. 25, 2014

In late 1938, dead-sure war was coming, Rosenstiel began bulwarking his company against war's impact.

From Time Magazine Archive

He left General Totten on the stairs, leaped down the remaining steps, and ran to a group of watchmen and night employees of the State House who were bulwarking the soldiers.

From All-Wool Morrison by Holman Day

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