adj. Without the presence or use of alphabetical letters.
adj. Illiterate.
the GNU version of the Collaborative International Dictionary of English
adj. Not having a letter.
adj. Illiterate.
The Century Dictionary and Cyclopedia
Unlettered; illiterate; not learned.
Word Usage
"If you're the type who just can't let go, whose 'Berry is worn to letterless nibs, who hears the buzz of an insect and reaches for your holster, I bring help."