from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not attested: a series of unattested quotations.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not supported by attestation, lacking supporting evidence in the form of assurance from an authority.
from The Century Dictionary and Cyclopedia
- Not attested; having no attestation.
un- + attested (Wiktionary)