Noun
the state of something that has outlived its relevance
mail that can neither be delivered nor returned
Source: WordNetdead-letter
Aftermath The constitution of 1919 was never formally repealed, but the Enabling Act meant that it was a dead letter. Source: Internet
“The supposed rule is a dead letter in speech, and in most kinds of writing,” Butterfield writes. Source: Internet
Dead letter The phrase "dead letter" refers to legislation that has not been revoked, but that has become inapplicable or obsolete or is no longer enforced. Source: Internet
His successful amendment that the county need only fund those schools where the buildings were in good repair served to make the Act a dead letter in Wales, where the counties were able to show that most Church of England schools were in poor repair. Source: Internet
If he or she is also chief executive, he or she can thus politically control the necessary executive measures without which a proclaimed law can remain dead letter, sometimes for years or even forever. Source: Internet
It was a dead letter. Source: Internet