Here are some common hydration definitions — pronounced hy·​dra'tion — according to medical dictionaries, Wikipedia, and thesauruses: The process of adding fluid to a body. Being in a hydrated state. Chemical reactions where water molecules combine with one other ingredient without hydrolysis.

What does hydration mean?

1 : the act or process of combining or treating with water: as. a : the introduction of additional fluid into the body hydration sometimes helps to reduce the concentration of toxic substances in the tissues.

What is hydration in the body?

Hydration is the replacement of body fluids lost through sweating, exhaling, and eliminating waste. On average, the body loses and needs to replace about 2-3 quarts of water daily. Luckily, many foods we eat are composed mostly of water. Foods with high water content include greens and most fruits and vegetables.