We're talking about over-exposure. Whenever it is mentioned that highlights are blown out or burned out, it means that the highlight areas have been over-exposed.
Overexposure is best detected immediately after the shot is made by reviewing the image in the camera using the LCD screen. It is also advisable to check the Highlight Alert feature in the Histogram - it blinks over any portion of the image that is clipping due to over-exposure.
Overexposure, or any exposure, is a function of 3 things - ISO setting, shutter speed and Aperture - not just any one of those things alone.
Once overexposure has been detected, it can be corrected by re-shooting with a smaller aperture, or a shorter exposure time or a lower ISO setting. Your preferred method of correcting can be any number of different approaches, but it is all simpler when settings are made in Manual.