from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Impossible to convince: was inconvincible as to the validity of our idea.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Incapable of being convinced.
from the GNU version of the Collaborative International Dictionary of English
- adj. Not convincible; incapable of being convinced.
from The Century Dictionary and Cyclopedia
- Not convincible; incapable of being convinced.
in- + convincible (Wiktionary)