Three-dimensional (3D) refers to objects or images that have depth, width, and height, making them appear more realistic compared to two-dimensional (2D) representations, which only have height and width. In a 3D space, you can visualize how objects occupy volume, allowing for a more immersive experience. This concept is widely used in various fields, including art, design, and computer graphics. In technology, 3D modeling involves creating digital representations of objects that can be manipulated and viewed from different angles. This technique is essential in industries like architecture, gaming, and animation, where realistic visuals enhance user engagement and understanding. 3D printing is another application, allowing for the physical creation of objects based on digital models.