from the GNU version of the Collaborative International Dictionary of English
- n. a class mail comprising letters, postcards, and other mail sealed against inspection, having a higher priority than second, third, or fourth-class mail; -- it is the highest class of mail not handled in a special manner, as is registered or priority mail.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. mail that includes letters and postcards and packages sealed against inspection
Sorry, no etymologies found.