The Collaborative International Dictionary
Letterless
Letterless \Let"ter*less\ (l[e^]t"t[~e]r*l[e^]s), a.
Not having a letter.
Illiterate. [Obs.]
--E. Waterhouse.
Wiktionary
letterless
a. 1 Without the presence or use of alphabetical letters. 2 illiterate.
Usage examples of "letterless".
Ingerson had described your willingness to fill out a load with letterless applicants if insufficient lettered ones appeared.