Casino - A public place, generally a building for entertainment, almost always housing gambling. A casino usually provides visitors the ability to play table games, such as blackjack or roulette, slot machines and sometimes sports betting. With the rise of internet usage, the casino has expanded into the virtual world of online gambling. This has led to a modifier of "online" or "land based" often being placed before the term "casino".

From: www.online-gambling.com.