Synonyms

undefended

British

/ ˌʌndɪˈfɛndɪd /

adjective

not having people to provide resistance against danger, attack, or harm

"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

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:

undefended

The school’s entrance looked totally undefended as I walked up.

From The Wall Street Journal ● Oct. 9, 2026

As the home team sprung forward from midfield, Gouri found Mason Greenwood racing through an undefended inside-right channel.

From Barron's ● Feb. 3, 2026

Canada and the US share the world's longest undefended border.

From BBC ● Jan. 7, 2025

As the martian interior cooled, leading theories hold, its magnetic field died out, leaving the atmosphere undefended and ending this warm and wet period, when the planet might have hosted life.

From Science Magazine ● Dec. 19, 2022

Instead, he went to the press, vulnerable and undefended.

From "Boots on the Ground: America's War in Vietnam" by Elizabeth Partridge

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023