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.

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verb (used with object)

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

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verb

1. (tr) to defend or fortify with or as if with a bulwark

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."

Example Sentences

Kathryn Murdoch also has invested in the Bulwark, a fast-growing digital news startup for opponents of President Trump.

From The Wall Street Journal • May 20, 2026

The couple met on dating app Hinge, "so there is still hope in those dating apps," Mamdani said in an interview with The Bulwark.

From BBC • Nov. 5, 2025

Sarah Longwell, founder and publisher of the Bulwark, spared nothing in her criticism of Murkowski.

From Los Angeles Times • Jul. 13, 2025

Here is video of the incident that was provided to the Bulwark by Padilla’s staff:

From Slate • Jun. 12, 2025

The Dutch have made it very strong, it being their main Bulwark towards the Duchy of Cleves.

From The Memoirs of Charles-Lewis, Baron de Pollnitz, Volume III Being the Observations He Made in His Late Travels from Prussia thro' Germany, Italy, France, Flanders, Holland, England, &C. in Letters to His Friend. Discovering Not Only the Present State of the Chief Cities and Towns; but the Characters of the Principal Persons at the Several Courts. by P?llnitz, Karl Ludwig von

Related Words

• bastion
• fortress
• mainstay
• redoubt