"illiterate" in the noun sense
1. illiterate, illiterate person, nonreader
a person unable to read
"illiterate" in the adjective sense
1. illiterate
not able to read or write
2. ignorant, illiterate
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"
3. illiterate
lacking culture, especially in language and literature
Source: WordNet® (An amazing lexical database of English)
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