Lotto/ˈlɑːtəʊ/ Definition 1 of 2Pro Tip 1/3Game of Chance Understand that 'lotto' depends on luck, not skill. No matter how much you practice, winning the lotto is purely a game of chance. Pro Tip 2/3Casual Conversation Primarily used in informal settings when talking about personal experiences or dreams. I always dream about what I'd do if I won the lotto. Pro Tip 3/3Hopeful Tone People often mention the lotto when expressing hope for sudden wealth. With some luck in the lotto, I could retire early!