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1. Letters and packages that are transported by aircraft
    
2. A system of conveying mail by aircraft
   - airpost

1. Send or transport by airmail
   "Letters to Europe from the U.S. are best airmailed"

1. Mail that is sent by air transport

Derived forms: airmailing, airmailed, air mails, airmails

Type of: mail, mail service, post [Brit], postal service, send

Antonym: surface mail

Encyclopedia: Airmail