black-letter Meaning, Definition & Usage

Black"-let`ter adjective
Definitions
  1. Written or printed in black letter; as, a black-letter manuscript or book.
  2. Given to the study of books in black letter; that is, of old books; out of date.
    Kemble, a black-letter man! J. Boaden.
  3. Of or pertaining to the days in the calendar not marked with red letters as saints' days. Hence: Unlucky; inauspicious.

Webster 1913