Let·ter v. t. [imp. & p. p. Lettered p. pr. & vb. n. Lettering.] To impress with letters; to mark with letters or words; as, a book gilt and lettered.
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  Let·tered a.
  1. Literate; educated; versed in literature. “ Are you not lettered?”
     The unlettered barbarians willingly accepted the aid of the lettered clergy, still chiefly of Roman birth, to reduce to writing the institutes of their forefathers.   --Milman.
  2. Of or pertaining to learning or literature; learned. “ A lettered education.”
  3. Inscribed or stamped with letters.
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  lettered
       adj 1: able to read and write well
       2: highly educated; having extensive information or
          understanding; "an enlightened public"; "knowing
          instructors"; "a knowledgeable critic"; "a knowledgeable
          audience" [syn: enlightened, knowing, knowledgeable,
           learned, well-educated, well-read]