Definition of letterless in US English:

letterless

adjective

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

  • 2Having no letters or correspondence; characterized by a lack of post or mail.

  • 3Not marked or inscribed with letters; having no letters.

noun

  • Illiterate or uneducated people considered collectively. Now rare.

Origin

Late 16th century (in an earlier sense). From letter + -less.

Pronunciation

letterless

/ˈlɛtələs/