Of a person: unable to read and write, illiterate. Also: uneducated; unlearned, poorly read.

Unable to read or write, illiterate (now rare). Later, more generally: unacquainted with, or uninterested in, literature or writing; characterized…

Of persons: Ignorant of letters or literature; without book-learning or education; unlettered, unlearned; spec. (in reference to census returns…

Engaged in or requiring elementary instruction; illiterate; ignorant; (of knowledge, a work, etc.) elementary; simplistic. Now rare.

Of a person or group of people: unacquainted with letters or literature; illiterate, uneducated. Cf. unlettered, adj. 1a.

= illiterate, adj. 1.

Illiterate, unlettered.

Illiterate, void of clerkly skill. Obsolete.

Characterized by ignorance of or lack of familiarity with the letters of the alphabet; wholly or partially illiterate. Cf. analphabetic, adj. 1.

= analphabet, adj.

Not acquainted with the alphabet. Also figurative.

That does not or cannot read.

Characterized by ignorance of or lack of familiarity with the letters of the alphabet; wholly or partially illiterate; (hence) uneducated…

(un-, prefix1 affix 1.)