mailpiece
mailpiece · mailpieces
A piece of mail, that is, an item of mail(countable) A piece of mail, that is, an item of (physical) mail; especially, an item of flat envelope form factor as contrasted with an item of package form factor.
Meaning
1 senses(Canada, US)(countable) A piece of mail, that is, an item of (physical) mail; especially, an item of flat envelope form factor as contrasted with an item of package form factor.
You have 0 mailpiece(s) and 1 inbound package(s) arriving soon. [U.S. Postal Service Informed Delivery email of the 2020s]
Origin
From mail + piece; part of the business jargon of postal services and mail marketers for mFrom mail + piece; part of the business jargon of postal services and mail marketers for more than a century, but not common among the general public until the 21st century.
Wiktionary, CC BY-SA 4.0 · source