subtitle

US /ˈsʌbˌtaɪ.t̬əl/
UK /ˈsʌbˌtaɪ.t̬əl/
"subtitle" picture
1.

a secondary title of a book, article, or other publication

:
The book had an intriguing main title and a descriptive subtitle.
Each chapter began with a clear heading and a brief subtitle.
2.

a caption displayed at the bottom of a cinema or television screen that translates or transcribes the dialogue or narrative

:
Turn on the subtitles so we can understand the foreign film.
The news broadcast included closed subtitles for the hearing impaired.
1.

provide (a film or broadcast) with subtitles

:
They decided to subtitle the documentary for international release.
It takes a lot of effort to accurately subtitle a live broadcast.