from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not approved or sanctioned: an unapproved vaccine; an unapproved protest march.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not approved
from the GNU version of the Collaborative International Dictionary of English
- adj. Not approved.
- adj. Not proved.
from The Century Dictionary and Cyclopedia
- Not approved; not having received approbation. Not justified and confirmed by proof; not corroborated or proved.
un- + approved (Wiktionary)