(of a video recording or broadcast) Having captions that can only be seen with the appropriate equipment.

plural of closed caption

(television) Text which can be displayed on a television or other video screen with suitable equipment, usually a transcription or description of audio material.

The display of text on a television or video screen, usually a transcription of the audio portion of a program as it occurs (either verbatim or in edited form), most frequently used by the deaf and language learners. Closed captions are encoded invisibly, and displayed by a decoder.

Alternative form of closed captioning