Forget the National Enquirer. It doesn't happen often but it has happened with people who were ostensibly dead. I wasn't referring to premature burial which obviously can't happen with embalming or cremation; however, people also have revived in funeral homes prior to embalming, albeit also very rare. But there have been cases of premature burial in bygone eras as you pointed out. I think the accepted definition of dead by the medical profession is brain dead, the cessation of all brain function. My original point was if you truly die you can't come back to tell about it.
That is the point.
A person can be submerged in extremely cold water for hours and the body recovered, not breathing, no pulse, a core body temperature below that can support life, but they are not considered dead until they are warm and dead. Some of those we can get back. It led to our current protocols of deliberate induced hypothermia for cardiac arrest.