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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use drop letter in a sentence
It must be a drop letter, as no mail has been received this morning.'The Comstock Club | Charles Carroll Goodwin
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
"Here's a drop letter for you, Jack," remarked Gif, who was distributing some of the mail.The Rover Boys on Snowshoe Island | Edward Stratemeyer
One morning Paul found a drop-letter in the mail which greeted him daily.The Spinner's Book of Fiction | Various
The drop letter rate of postage will remain the same as now.History of the Postage Stamps of the United States of America | John Kerr Tiffany