Definition of "captioning" [captioning]

• Present participle of caption. (verb)

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• "Lastly, some information comes through in captioning (background song titles and artists, specialized terms, foreign language vocabulary) that isn't available in audio."
• "There are no extras, and I like watching movie with closed captioning, which is only available on the computer."
• "All functions such as captioning, rotating, enhancing a photo, and splitting a video file into clips are done through contextual menus."