A dipole glass is an analog of a glass where the dipoles are frozen below a given freezing temperature Tf introducing randomness thus resulting in a lack of long-range ferroelectric order. A dipole glass is very similar to the concept of a spin glass where the atomic spins don't all align in the same direction (like in a ferromagnetic material) and thus result in a net-zero magnetization. The randomness of dipoles in a dipole glass creates local fields resulting in short-range order but no long-range order.