an order for goods received or shipped through the mail.
the business of selling merchandise through the mail.
mail-or•derPronunciation: (māl'ôr"dur), [key]
pertaining to or obtained by mail order: a dozen mail-order rosebushes.
to order (merchandise) by mail: to mail-order fruitcakes for Christmas.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.