1) Analphabet 2) Preliterate 3) Uneducated 4) Unlettered 5) Unread 1) Analphabetic 2) Antonym for erudite 3) Functionally illiterate 4) Nonreader 5) Not able to read or write 6) One who signs with an X 7) Preliterate 8) Semiliterate 9) Unable to read 10) Unable to read and write 11) Uneducated 12) Unlettered 
• (a.) Ignorant of letters or books; unlettered; uninstructed; uneducated; as, an illiterate man, or people.
Il·lit'er·ate adjective [ Latin illiteratus : prefix il- not + literatus learned. See In- not, and Literal .] Ignorant of letters or books; unlettered; uninstructed; uneducated; as, an illiterate man, or people. Syn. -- Ignorant; untaught; unlearned;...
[adj] - not able to read or write 2. [n] - a person unable to read
illiterate 1. Someone who is unable to read and write. 2. Having or demonstrating very little or no education. 3. Showing lack of culture; especially, in language and literature. 4. Displaying a marked lack of knowledge in some particular field or area.
adjective uneducated in the fundamentals of a given art or branch of learning; lacking knowledge of a specific field; `she is ignorant of quantum mechanics`; `he is musically illiterate` adjective not able to read or write
unable to read and write: an illiterate group. · having or demonstrating very little or no education. · showing lack of culture, esp. in language and literature. · displaying a marked lack of knowledge in a particular field: He is musically illiterate.
[Literary terms] lacking culture, especially in language and writing