Definition: "Distilled water" is a type of water that has been purified through a process called distillation. During distillation, water is heated until it turns into steam, and then the steam is cooled down to turn back into liquid. This process removes impurities, minerals, and contaminants from the water, making it very pure.
In summary, distilled water is very pure water obtained through distillation, used in various specialized applications rather than for regular drinking.