from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or being a class of mail consisting of merchandise and some printed matter weighing over eight ounces and not sealed against inspection.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. A former class of mail consisting mostly of heavier printed matter
from The Century Dictionary and Cyclopedia
- Belonging to the class next after the third.
Sorry, no etymologies found.