BUD is not just a game; it's a vast, vibrant world of 3D interactive content, where your imagination takes the lead. Join a community with millions of players around the world, and experience the thrill of bringing your ideas to life in an expansive 3D universe. BUD definition: 1. a small part of a plant, that develops into a flower or leaf 2. covered with buds: 3. → buddy…. Learn more. A bud is an undeveloped or embryonic shoot in botany, or an outgrowth from the body in zoology. Learn about the types, locations, status, and functions of buds in plants and animals. Empowered LXP is a learning experience platform that empowers organizations and individuals.