Dead Letter
[n] a letter that can neither be delivered nor returned
[n] the state of something that has outlived its relevance
Related Information
Related Terms
aerogram, aimlessness, air letter, airgraph, billet-doux, bull, chain letter, dimissorial, dimissory letter, drop letter, emptiness, empty sound, encyclical, fan letter, form letter, futility, inanity, insignificance, letter of credit, letter of introduct