Definition of red-lettered in English:

red-lettered

Pronunciation /ˈrɛdˌlɛtəd/

adjective

  • Characterized or indicated by red letters; written in red; marked out for particular attention with, or as with, red letters; memorable, significant, noteworthy.

    In earlier use, with reference to the use of red letters to indicate a saint's day or feast on an ecclesiastical calendar.

Origin

Mid 17th century; earliest use found in Mercurius Politicus. From red letter + -ed.