Definition of red-lettered in US English:

red-lettered

adjective

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

Origin

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

Pronunciation

red-lettered

/ˈrɛdˌlɛtəd/