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
Every poorly thrown or dropped pass, every penalty, every sloppy or missed tackle, every undefended pass put the team in a position to need a field goal to win.
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Reader Commentary,
Baltimore Sun,
5 Jan. 2026
Trouba opened the scoring in the first period with an undefended slap shot after an egregious Blackhawks turnover.
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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
See All Example Sentences for undefended
Reader Commentary,
Baltimore Sun,
5 Jan. 2026
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
See All Example Sentences for undefended
Recent Examples of Synonyms for undefended
Adjective
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The set up leaves California vulnerable to the unpredictable nature of the stock market, dramatic swings in revenue and, in recent years, reliant on poor projections.
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Countries around the Caribbean Sea are vulnerable to major earthquakes because of the tectonic plates in the region.
Adjective
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But when his son Naseer was born in May 2025, Ajas Ahmed had never felt so helpless.
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Over the course of a 60-yard run, Maradona danced past opponents, escaped challenges and left English defenders helpless before beating the goalkeeper with a clinical finish.
Adjective
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Tomatoes are susceptible to numerous diseases and environmental challenges that can impact plant growth and fruit production.
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Wood’s career was derailed by injuries, leading to worries of hard throwers being susceptible to blowing out pitching arms.
Adjective
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If your cat or dog is outdoors and unprotected, fleas hitch a ride and come indoors with them.
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The Celtics’ final offer to the Bucks included 29-year-old five-time NBA All-Star Jaylen Brown and two unprotected first-round picks, according to Charania.
Cite this Entry
“Undefended.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undefended. Accessed 28 Jun. 2026.
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