defection

noun

de·​fec·​tion di-ˈfek-shən How to pronounce defection (audio)
: conscious abandonment of allegiance or duty (as to a person, cause, or doctrine) : desertion

Examples of defection in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Filling the seat puts pressure on House Speaker Mike Johnson With such tight numbers, Republicans can afford only three defections to pass a piece of legislation with a majority vote. Laura Gersony, AZCentral.com, 15 July 2025 The House passed the bill 218-214, with only two Republican defections. ‘BEAUTIFUL’ BILL 2.0? Washington Examiner Staff, The Washington Examiner, 4 July 2025 With a razor-thin majority, Johnson can afford only three defections if all members are voting and present. Lauren Peller, ABC News, 2 July 2025 Republicans hold a 53 to 47 majority and face United Democratic opposition, and the defection of at least two of their members. Taylor Wilson, USA Today, 1 July 2025 See All Example Sentences for defection

Word History

Etymology

borrowed from Latin dēfectiōn-, dēfectiō "falling short, failure, abandonment of allegiance," from dēficere "to be lacking, fail, become disaffected, go over (to the side of an opponent)" + -tiōn-, -tiō, suffix of verbal action — more at deficient

First Known Use

1532, in the meaning defined above

Time Traveler
The first known use of defection was in 1532

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Cite this Entry

“Defection.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/defection. Accessed 30 Jul. 2025.

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