Three-D (Dimensional) refers to objects that have height, width, and depth, making them appear more realistic and lifelike. Unlike two-dimensional (2D) images, which only have height and width, 3D objects can be viewed from multiple angles, providing a sense of volume and space. This dimensionality is essential in various fields, including art, design, and computer graphics. In technology, 3D modeling is used to create digital representations of objects for movies, video games, and simulations. 3D printing is another application, allowing for the physical creation of these models using materials like plastic or metal. Overall, 3D enhances visual experiences and practical applications across many industries.