certified mail
First class mail that provides the sender a proof of mailing and a delivery receiptFirst class mail that provides the sender a proof of mailing and a delivery receipt.
Meaning
1 senses(US, uncountable)First class mail that provides the sender a proof of mailing and a delivery receipt.
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable