Dictionary.com
Thesaurus.com
Showing results for certified mail. Search instead for certified+mail.

certified mail

American  

noun

  1. uninsured first-class mail requiring proof of delivery.

Etymology

Origin of certified mail

First recorded in 1950–55

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.