WordWeb Online

1. Any compound that contains water of crystallization

1. Supply water or liquid to in order to maintain a healthy balance
   "the bicyclists must be hydrated frequently"
    
2. Become hydrated and combine with water
    
3. Cause to be hydrated; add water or moisture to
   "hydrate your skin"

Derived forms: hydrates, hydrating, hydrated

Type of: change, chemical compound, compound, furnish, humidify, moisturise [Brit], moisturize, provide, render, supply

Antonym: dehydrate

Encyclopedia: Hydrate