A "multibillionaire" is a person who has a net worth of at least several billion dollars. It means they have an enormous amount of money, more than most people can even imagine. Full definition
Although power laws clearly do not apply to human height, they show up often in everyday situations, from income distribution (billions of people living on a few dollars a day, a handful of multibillionaires) to the weather (lots of small storms, just a few hurricane Katrinas). (discovermagazine.com)
Koch Industries multibillionaire Koch brothers bankroll attacks on climate change science and policy (heatisonline.org)
Our first post on the Koch brothers, from March 2010: «Koch Industries multibillionaire Koch brothers bankroll attacks on climate change science and policy» (climatesciencewatch.org)