ETYM Latin illiteratus: pref. il- not + literatus learned. Related to In- not, and Literal.
Not able to read or write.

1. Not adequately educated in the use of numerical terms and concepts.
2. Not having a good education.

1. Lacking facility in reading and writing and ignorant of the knowledge to be gained from books
2. Illiterate
3. Not marked with letters

Lacking in schooling; SYN. untaught, untutored.

1. Having no formal learning or training
2. Naive, unsophisticated
3. Not produced or developed by instruction; native