Definition of close-caption in US English:

close-caption

verb

North American
  • with object Closed-caption.

Origin

1970s; earliest use found in The Washington Post. Apparently an alteration of closed-caption, after either close or close: the article cited in quot. 1979 at main sense elsewhere uses closed-caption.

Pronunciation

close-caption

/ˌkləʊz ˈkapʃn/