any activity that is done with the intention of surviving after an apocalyptic event.
for example: massive stockpiling of so-called "assault" weapons and ammunition, buying enough
food that last for months or years, various medical supplies including
drugs (which will be one of the most valued commodities in the event of societal breakdown), installing alternative energy sources like
solar, various fuel sources, hundreds of varieties of heirloom seeds (not
GMO), etc...
the vast majority of the population doesn't believe such an event is possible, right now, hundreds of millions of
americans take endless luxuries for granted, electricity, refrigerators, clean running water on tap, food on the shelves at the grocery store, prescriptions refills on demand, emergency response teams one call away..
this is exactly why "prepparations" are made, because when an endless
mob of demoralized
humans acting on survival instinct begin to use any and all means including unthinkable violence against others to secure resources, the "preppers" will be sitting
pretty in their converted missile silos underground sipping wine and waiting it out..