3D stands for three-dimensional, which refers to the three spatial dimensions of width, height, and depth. In geometry, a three-dimensional space is a mathematical space in which three values (coordinates) are required to determine the position of a point. The physical world and everything that is observed in it are three-dimensional. 3D design refers to using software to create a digital model of a three-dimensional shape or object, and it is used by organizations and professionals across industries to communicate ideas, create products and customer experiences, teach concepts, and more. 3D images and objects possess the added dimension of depth, or the z coordinate which is part of the z-axis, and they denote images or objects that have depth or the illusion of depth such as phones, computers, and 3D films. All three-dimensional figures occupy space, which is measured in terms of volume.