dehydration

noun

1. the act or process of dehydrating.
2. an abnormal loss of water from the body, especially from illness or physical exertion.

n.

1. Excessive loss of water from the body or from an organ or a body part, as occurs during illness or fluid deprivation.
2. The process of removing water from a substance or compound.

1. The process of losing or removing water or moisture.
2. A condition caused by the excessive loss of water from the body, which causes a rise in blood sodium levels. Since dehydration is most often caused by excessive sweating, vomiting, or diarrhea, water loss is usually accompanied by a deficiency of electrolytes. If untreated, severe dehydration can lead to shock.

The removal of water; in chemistry, the loss of two hydrogen atoms for every oxygen atom (see H2O).