- the act or process of dehydrating.
- an abnormal loss of water from the body, especially from illness or physical exertion.
- Excessive loss of water from the body or from an organ or a body part, as occurs during illness or fluid deprivation.
- The process of removing water from a substance or compound.
- The process of losing or removing water or moisture.
- 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.