an expedited domestic mailing service of the U.S. Postal Service, usually guaranteeing delivery overnight or within 24 hours.
- ex·press-mail, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use Express Mail in a sentence
There was also an “Express Mail” corresponding to the present “fast mail.”Historic Highways of America (Vol. 10) | Archer Butler Hulbert
With him was expected a canoe, under the charge of James L. Schoolcraft, with some supplies left behind, and an Express Mail.Personal Memoirs Of A Residence Of Thirty Years With The Indian Tribes On The American Frontiers | Henry Rowe Schoolcraft