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mineral water n.
Naturally occurring or prepared water that contains dissolved mineral salts, elements, or gases, and is often used therapeutically.
water that contains a large quantity of dissolved minerals or gases. Mineral water from natural springs commonly has a high content of calcium carbonate, magnesium sulfate, potassium, and sodium sulfate. It may also be impregnated with such gases as carbon dioxide or hydrogen sulfide. Mineral water is produced artificially by adding salts to distilled water or aerating it with carbon dioxide. The mineral content of both natural and artificial mineral water varies greatly, and in some cases it may be less than that of ordinary tap water.