What describes amorphous solids?

Amorphous solids are characterized by their lack of long-range order in their atomic structure, which differentiates them from crystalline solids that possess a well-defined geometric arrangement of atoms. In amorphous solids, the atoms are arranged more randomly, leading to properties such as the absence of a specific melting point. Instead of smoothly transitioning from solid to liquid at a particular temperature, amorphous solids soften over a range of temperatures. This gives them unique characteristics such as flexibility and a variety of optical properties, which are utilized in materials like glass and certain plastics. Therefore, the defining feature of amorphous solids is indeed their lack of long-range atomic order and specific melting points.