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dead letter

noun

  1. a law, ordinance, etc., that has lost its force but has not been formally repealed or abolished.

  2. a letter that cannot reach the addressee or be returned to the sender, usually because of incorrect address, and that is sent to and handled in a special division or department dead-letteroffice of a general post office.



dead letter

noun

  1. a letter that cannot be delivered or returned because it lacks adequate directions

  2. a law or ordinance that is no longer enforced but has not been formally repealed

  3. informalanything considered no longer worthy of consideration

“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
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Other Word Forms

  • dead-letter adjective
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Word History and Origins

Origin of dead letter1

First recorded in 1570–80
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Idioms and Phrases

An unclaimed or undelivered letter that is eventually destroyed or returned to the sender. For example, She moved without leaving a forwarding address, so her mail ended up in the dead letter office . [c. 1700]

A statute or directive that is still valid but in practice is not enforced. For example, The blue laws here are a dead letter; all the stores open on Sundays and holidays . [Second half of 1600s]

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Example Sentences

Examples have not been reviewed.

The Congress as it is currently composed, with Republican majorities in both chambers, is a dead letter when it comes to restraining the outright undemocratic insanity of this president.

From

This, Kagan says, renders impeachment and conviction virtually a dead letter.

From

Now, thanks to Republican opposition in Congress, it could be a dead letter.

From

In two other states, Georgia and Mississippi, top Republicans have signaled willingness to discuss expansion this year so the issue isn’t a dead letter.

From

That effort would involve rallying deeply anti-spending Republicans around a stopgap funding bill that is likely to be a dead letter in the Democratic-controlled Senate.

From

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