Three-dimensional (3D) refers to objects that have depth, width, and height, making them appear more realistic than two-dimensional (2D) images, 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 animation. In technology, 3D modeling and printing have become popular, enabling the creation of physical objects from digital designs. Virtual reality (VR) and augmented reality (AR) also utilize 3D elements to enhance user experiences, making environments and interactions feel more lifelike and engaging.