DEAD LETTER

Pronunciation (US): (GB):

Meaning:

Mail that can neither be delivered nor returned

Synonyms:

dead letter; dead mail

Classified under:

Nouns denoting communicative processes and contents

Hypernyms ("dead letter" is a kind of...):

letter; missive (a written message addressed to a person or organization)

Meaning:

The state of something that has outlived its relevance

Synonyms:

dead letter; non-issue

Classified under:

Nouns denoting stable states of affairs

Hypernyms ("dead letter" is a kind of...):

state (the way something is with respect to its main attributes)