Distilled Water is a water that has been 'purified' of its contaminants, acids and minerals such as salt.
Attention!!! Rain water is not distilled Water.
Distilled Water is water that has virtually all of its impurities removed through distillation. Distillation involves boiling the water and then condensing the steam into a clean container, leaving most if not all solid contaminants behind.
Distilled Water is not a good conductor of electricity.