What exactly is 4D? 4D means "4 digits." It is a popular lottery video game in Singapore in which gamers select a combination of 4 numbers from 0000 to 9999. How can the sport Work? Players decide on their wished-for four-digit range or can opt for a random variety. https://joshua665j3hy0.webbuzzfeed.com/28688918/4d-success-now