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dead letter SimpleWikiWiktionaryGoogle検索CollinsCambridgeLongmanLongman英和Learners 【 13765 】 【意味】 "[名詞] mail that can neither be delivered nor returned [例] The letter was returned as dead letter. [例] The letters were dead letters because the recipient had moved. [例] It was a dead letter because the address was wrong. [意味] 配達不能郵便, 配達不能郵便物, 死んだ手紙, 不達郵便, 未配達郵便 ; [同義語] dead mail ; [上位語] missive, letter ; [同義語群] 06626743-n" [名詞] the state of something that has outlived its relevance [例] The law is a dead letter. [例] The agreement is a dead letter because the parties have not signed it. [例] They believed that the agreement was a dead letter. ; [同義語] non-issue ; [上位語] state ; [同義語群] 14006821-n