subtitle
n.
An extension of the principal title (the title proper), usually distinguished from the principal title by design or a different typeface.
Audiovisual RecordsAudiovisual RecordsDialog that is displayed as text, usually at the bottom of the frame or above or below the stage.
Notes
In cataloging, a subtitle1 is called other title information. - Subtitles2 are commonly used in foreign language films and operas to supply a translation of the dialog. In silent films, inner titles displayed full-screen between shots are sometimes called subtitles.