D defs.my
Entry 3 senses Webster, 1913

Black-letter

· Black·-let·ter · IPA
01 a. Written or printed in black letter; as, a black-letter manuscript or book.
  1. 1.
    Written or printed in black letter; as, a black-letter manuscript or book.
  2. 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    Given to the study of books in black letter; that is, of old books; out of date.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. 3.
    Of or pertaining to the days in the calendar not marked with red letters as saints' days; -- compare red-letter.