👉 "Overfine" is a phrase used in the context of environmental science and engineering to describe the process of making a material more highly polished or refined. This can include processes such as grinding, polishing, etching, or other techniques that aim to make materials more durable, less prone to wear, and easier to work with. In general, overfine means to increase the surface area or size of a material so it is able to withstand greater stress and force, making it more resistant to damage.