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drop letter

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noun
  1. a letter that is mailed to a local address at a post office without city delivery or a rural delivery service and must be picked up by the addressee.
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Origin of drop letter

An Americanism dating back to 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for drop letter

Historical Examples

  • One morning Paul found a drop-letter in the mail which greeted him daily.

    The Spinner's Book of Fiction

    Various

  • When in 1875 delivery by letter-carrier was introduced in certain towns, the drop-letter rate was not disturbed.