as in vulnerable
lacking protection from danger or resistance against attack
the cowardly soldiers fled, leaving the palace undefended
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Recent Examples of undefended
Trouba opened the scoring in the first period with an undefended slap shot after an egregious Blackhawks turnover.
—
CBS News, 7 Dec. 2025
Mark Collins, who was born and raised in Newfoundland, Canada, said Canadians have long treasured their friendship with the United States and the fact that the US-Canada border is the longest undefended border on the planet.
—Matt Egan, CNN Money, 13 Oct. 2025
Even with changes that came after the 2001 terrorist attacks, Abdool, noting the reputation of the longest undefended border in the world, said the experience of traveling back and forth between the United States and Canada wasn’t like crossing other international borders.
—Eric D. Lawrence, Freep.com, 16 May 2025
Well, turns out that Dragonstone is pretty undefended now, too.
—James Grebey, Vulture, 4 Aug. 2024
See All Example Sentences for undefended
CBS News, 7 Dec. 2025
Mark Collins, who was born and raised in Newfoundland, Canada, said Canadians have long treasured their friendship with the United States and the fact that the US-Canada border is the longest undefended border on the planet.
—Matt Egan, CNN Money, 13 Oct. 2025
Even with changes that came after the 2001 terrorist attacks, Abdool, noting the reputation of the longest undefended border in the world, said the experience of traveling back and forth between the United States and Canada wasn’t like crossing other international borders.
—Eric D. Lawrence, Freep.com, 16 May 2025
Well, turns out that Dragonstone is pretty undefended now, too.
—James Grebey, Vulture, 4 Aug. 2024
See All Example Sentences for undefended
Recent Examples of Synonyms for undefended
Adjective
-
Consumer groups say wage advances can be riddled with fees and in some cases, similar to payday loans, can lead America’s most vulnerable workers into an unhealthy debt spiral.—
Cheryl Winokur Munk,
CNBC,
27 Feb. 2026
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For less than 1% of the federal budget, USAID delivered food, medicine and basic education to vulnerable places worldwide.—
Sun Sentinel Editorial Board,
Sun Sentinel,
27 Feb. 2026
Adjective
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Volantis, whose seven shutout innings were achieved with remarkable ease, is the latest Texas arm to render the opposition helpless.—
David Eckert,
Austin American Statesman,
23 Feb. 2026
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The timing of this recent turn to tanking is just another example of the helpless, tireless tardiness that has plagued the Karnišovas era in Chicago.—
Julia Poe,
Chicago Tribune,
21 Feb. 2026
Adjective
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That’s because, unlike their salaried counterparts, boomers’ asset returns aren’t tied to inflation and are therefore more susceptible to declines in the real value of their disposable income.—
Eleanor Pringle,
Fortune,
1 Mar. 2026
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Choose less susceptible plants for future plantings.—
Arricca Elin SanSone,
Southern Living,
1 Mar. 2026
Adjective
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Additionally, residents are warned of the possible damage that could be done on unprotected outdoor plumbing.—
Veronica Fernandez-Alvarado
Updated February 20,
Sacbee.com,
21 Feb. 2026
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The Rangers acquired Baumler, a 24-year-old right-hander, after he was left unprotected by the Baltimore Orioles before December’s Rule 5 draft.—
Shawn McFarland,
Dallas Morning News,
14 Feb. 2026
Cite this Entry
“Undefended.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undefended. Accessed 3 Mar. 2026.
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