air letter

noun

1

: an airmail letter

2

: a sheet of airmail stationery that can be folded and sealed with the message inside and the address outside

Word History

First Known Use

1918, in the meaning defined at sense 1

Kids Definition

air letter

noun

1

: an airmail letter

2

: a sheet of airmail writing paper that can be folded and sealed with the message inside and the address outside