registered mailReg·is·tered Mail
- a postal service for sending mail of high monetary value: a record of sending the mail is provided, it is signed for by each postal employee handling it, signed for by the addressee, and may be insured
- mail sent by this service
A trademark for a method of mail delivery that is closely monitored by the postal service to assure the mail arrives at its destination safely.
- a special type of mail that provides more control than regular mail.