illiterateEnglishOxford American Thesaurusilliterate adjective 1 he was no illiterate peasant: unable to read or write, unlettered, analphabetic, functionally illiterate. ▷antonyms literate. 2 a politically illiterate youth: ignorant, unknowledgeable, uneducated, untaught, unschooled, untutored, untrained, uninstructed, uninformed, unlearned, unread, unenlightened, benighted, backward; literary nescient. ▷antonyms literate; knowledgeable.word toolkitilliterateSee ignorant.