water that has been purified by distillation (boiling the water off as steam and condensing it back to a liquid, leaving the impurities behind) Having been boiled, it is also sterile
Water which has been purified by boiling, and condensing the resulting steam Distilled water can be used for brewing if the local tap water is unsuitable, but it may not contain sufficient trace minerals for good yeast health
Water that has been treated by boiling and condensation to remove solids, inorganics, and some organic chemicals