/air"mayl'/ , n.
1. the system, esp. a government postal system, of sending mail by airplane.
2. a letter, package, etc., sent by this system.
3. a stamp authorizing delivery of mail by this system.
adj.
4. of or pertaining to airmail.
adv.
5. by airmail: Send all overseas letters airmail.
v.t.
6. to send via airmail: I airmailed the package yesterday. Also, air-mail .
[ 1910-15; AIR 1 + -MAIL 1 ]