A cube is a special type of a rectangular solid in which the length, width and height are exactly same. In geometry, a cube is a 3-dimensional solid, bounded by 8 vertices, 6 square faces, 12 sides, among which three meets at each vertex.

The definition of a cube states that it is a 3D, six sided solid figure with the same length, breadth, and height. The image given below explains what is a cube.