noun
Abbreviation of 航空郵便. Refers to the postal service that sends letters and parcels by air.
See also: 航空郵便
この手紙を航空便で送ってください。
Please send this letter by airmail.
noun
air service; air transport (of goods)
General term for transportation of cargo by air, not limited to postal mail.
生鮮食品は航空便で輸送される。
Perishable foods are transported by air service.