- 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.
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
One morning Paul found a drop-letter in the mail which greeted him daily.
When in 1875 delivery by letter-carrier was introduced in certain towns, the drop-letter rate was not disturbed.The Development of Rates of Postage
A. D. Smith