A "casino magnate" refers to a person who is very successful and influential in the casino industry. They are often rich and have made a significant amount of money through their involvement in casinos. Full definition
Las Vegas casino magnate Sheldon Adelson, for instance, has given a paltry $ 5 million to a group run by TD Ameritrade founder Joe Ricketts, who endorsed Trump only after he emerged victorious in the primaries. (timesunion.com)
The SL Green team is one of six bidders, including Las Vegas casino magnate Steve Wynn, which have been vying for the Ozone Park project. (therealdeal.com)
For the past decade Le Rêve (The Dream) by Pablo Picasso has been hanging on the wall of the offices of Las Vegas casino magnate Steve Wynn. (newlawjournal.co.uk)