1. express mail
Today we are going to learn “express mail”. It means to a post service that delivers letters and packages very quickly.
(1). My boss told me to send the package by express mail.
(2). Communications that show up in your voice mail, or by email, courier, express mail, or snail mail should be welcome, too.
2. air mail / airmail
Another phrase is “air mail / airmail”. It means the system of sending letters, parcels, and goods by air.
(1). Would you like to send this letter by air mail?
(2). Over the years, these gave way to stringers who sent their stories by sea or air mail, and then by telex and cable.