- to deprive (a chemical compound) of water or the elements of water.
- to free (fruit, vegetables, etc.) from moisture for preservation; dry.
- to remove water from (the body or a tissue).
- to deprive of spirit, force, or meaning; render less interesting or effectual.
- to lose water or moisture: Milk dehydrates easily.
- to lose or cause to lose water; make or become anhydrous
- to lose or cause to lose hydrogen atoms and oxygen atoms in the proportions in which they occur in water, as in a chemical reaction
- to lose or deprive of water, as the body or tissues
