dead letter

noun

1
: something that has lost its force or authority without being formally abolished
As a result of such loopholes, the statute became a dead letter.William M. McGovern, Jr. et al.
2
: a letter that is undeliverable and unreturnable by the post office

Examples of dead letter in a Sentence

Recent Examples on the Web
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While Chicago is at no imminent risk of instituting Johnson’s jobs tax following the City Council’s adamant rejection, Springfield ought to make the possibility of a later revival of that policy a dead letter. The Editorial Board, Chicago Tribune, 7 Apr. 2026 Put another way, ICE’s new interpretation turns the statute into a dead letter. Noah Feldman, Twin Cities, 6 Feb. 2026 Put another way, ICE’s new interpretation turns the statute into a dead letter. Noah Feldman, Mercury News, 4 Feb. 2026 That amendment had been made a dead letter by Jim Crow state legislatures and an acquiescent Supreme Court. Robert D. Bland, The Conversation, 3 Feb. 2026 See All Example Sentences for dead letter

Word History

First Known Use

1663, in the meaning defined at sense 1

Time Traveler
The first known use of dead letter was in 1663

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Cite this Entry

“Dead letter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dead%20letter. Accessed 14 Apr. 2026.

Kids Definition

dead letter

noun
1
: something that has lost its force or authority without being abolished
2
: a letter that cannot be delivered or returned by the post office
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