dead letter

dead letter.

1. A law or practice that, although not formally abolished, is no longer used, observed, or enforced.

2. A piece of mail that can be neither delivered nor returned because it lacks correct addresses for both the intended recipient and the sender. [Cases: Postal Service 24. C.J.S. Postal Service and Offenses Against Postal Laws § 20.]

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词条贡献者

译者大智，毕业于一所旨在培养高级翻译专业人才的翻译院校，擅长翻译各种与环境保护相关的法律文件。