Continuous autofocus refers to a feature in cameras that automatically adjusts the focus on a moving subject. It helps ensure the subject stays sharp and clear, even when they are constantly moving. Full definition
The One X captures 1080p video at a silky smooth 30 fps with continuous autofocus and stereo audio. (engadget.com)
Again, during video filming you'll find that you get continuous autofocus, so we don't have much to complain about. (pocket-lint.com)
Body and face detection is also available in video, as well as continuous autofocus, noise reduction, and the ability to take 8 megapixel still photos while recording 4K video. (appleinsider.com)