Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “dead letter”

dead letter

noun [C] (MAIL)   
a letter that cannot be delivered to the address written on it and cannot be returned to the person who sent it: the dead-letter officeThe postal system
(Definition of dead letter noun (MAIL) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of dead letter

More definitions for “dead letter”

Translations of “dead letter”

Word of the Day

exercise

physical activity that you do to make your body strong and healthy

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More