Yes, glass is a
dielectric material.
A dielectric is an insulating material that does not conduct electricity but can support electrostatic fields. Glass has a very high electrical resistance and a low conductivity, making it a good insulator. It also has a high dielectric constant, which means it can store electrical energy in an electric field.
Due to these properties, glass is often used in capacitors, insulators, and other electrical applications where non-conductive materials are needed.