air mail

(noun) mail that is sent by air transport. Synonyms: air mail.

(noun) letters and packages that are transported by aircraft. Synonyms: airmail.

(noun) a system of conveying mail by aircraft. Synonyms: airmail, airpost.

(verb) send or transport by airmail. Synonyms: airmail. Example: "Letters to europe from the u.s. are best airmailed."