bulwark

1 of 2

noun

bul·​wark ˈbu̇l-(ˌ)wərk 

-ˌwȯrk;

ˈbəl-(ˌ)wərk;

 sense 3 also  ˈbə-ˌläk

1

a

: a solid wall-like structure raised for defense : rampart

b

: breakwater, seawall

building a bulwark in the harbor

2

: a strong support or protection

democratic principles that stand as a bulwark against tyranny

a bulwark of freedom

3

nautical : the side of a ship above the upper deck

—usually used in plural

bulwark

2 of 2

verb

bulwarked; bulwarking; bulwarks

transitive verb

: to fortify or safeguard with a bulwark

ability to bulwark a moral choice

—Margaret Mead

Synonyms

Verb

• protect
• defend
• safeguard
• shield
• guard

Examples of bulwark in a Sentence

Noun

democratic principles that stand as a bulwark against tyranny

Verb

vowed to use any means necessary to bulwark the country against a terrorist attack

Recent Examples on the Web

Noun

Moderates, or at least traditionalists like John Thune, have been the bulwark against efforts to pack the Supreme Court, ignore the Senate parliamentarian, or change the filibuster. —Colin Pascal, Baltimore Sun, 7 July 2025

In theory, the power is intended to be a final bulwark against injustice or overly harsh punishment. —Brett Kelman, The Tennessean, 2 July 2025

Verb

Netflix has also bulwarked regional industries, Lustres argues. —John Hopewell, Variety, 16 June 2025

Greece was seen as bulwark against Moscow and its client states in southeastern Europe. —Matthew Wills, JSTOR Daily, 31 Jan. 2025

Word History

Etymology

Noun and Verb

Middle English bulwerke, from Middle Dutch bolwerc, from bolle tree trunk + werc work

First Known Use

Noun

15th century, in the meaning defined at sense 1a

Verb

15th century, in the meaning defined above

Kids Definition

bulwark

noun

bul·​wark

ˈbu̇l-(ˌ)wərk,

-ˌwȯrk;

ˈbəl-(ˌ)wərk

1

: a solid structure like a wall built for defense

2

: a strong support or protection

3

: the side of a ship above the upper deck

—usually used in plural

Etymology

Noun

Middle English bulwerke "bulwark," from early Dutch bolwerc (same meaning) — related to boulevard