The text display of spoken words, presented on a movie screen or a television (or other type of monitor), that allows a deaf or hard-of-hearing viewer to follow the dialogue and the action of a program simultaneously. This is much like providing motion-picture subtitling for a foreign-language film.

Display of text on a screen that copies the words spoken.

n. the placement of text in visual displays shown on movie theaters and on television screens. This verbal presentation concides with spoken words, such that the dialogues and actions match. See close [..]

The process of superimposing subtitles at the bottom of a TV screen. cart:

Also known as “closed captioning,” a means of displaying text over a video in an effort to provide additional or interpretive information to viewers who wish to access it. On the web, captioning is us [..]