Pronunciation: (âr'u-gram"), [key]
a sheet of lightweight paper, bearing an official postal stamp imprint, that is folded to form its own envelope and can be sent via airmail at a special, low rate because of its standard size, light weight, and lack of enclosures. Also,aerogram,aer'o•gramme".Cf. air letter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.