Roulette/ruːˈlet/ Definition 1 of 3Pro Tip 1/3Casino Game Roulette is often associated with gambling and casinos; it's a common betting game. They have blackjack and roulette at the new casino downtown. Pro Tip 2/3Luck-Based Roulette is a game of chance, not skill. The outcome is entirely random. He hoped his luck would change at the roulette wheel. Pro Tip 3/3Color & Number Bets When playing roulette, people bet on either a color (red or black) or a number. She placed her chips on red at the roulette table.