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 a law, ordinance, etc., that has lost its force but has not been formally repealed or abolished.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-letter office ) of a general post office.

Origin of dead letter

1
First recorded in 1570–80

Other words from dead letter

  • dead-letter, adjective

Words Nearby dead letter

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use dead letter in a sentence

  • This expectation of high dividends, I need hardly say, has not been realised, and the Act in this respect has been a dead letter.

  • In short, insurgency ceased to be a valid plea; if it existed in fact, officially it had become a dead letter.

    The Philippine Islands | John Foreman
  • Is it not a truth that even when we know what is required of us to be good, that self-knowledge is a dead letter to us?

  • The Articles of Confederation, as to purposes of revenue and finance, were nearly a dead letter.

  • A portion of the shore had been set apart for this "playing with fire," but within a year even this had become a dead letter.

    Mushroom Town | Oliver Onions

British Dictionary definitions for dead letter

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 a law or ordinance that is no longer enforced but has not been formally repealed

  1. informal anything 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

Other Idioms and Phrases with dead letter

dead letter

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]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.