1. (chemistry) containing combined water (especially water of crystallization as in a hydrate)
   "hydrated minerals often have a different appearance than their anhydrous counterparts";
   - hydrous

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
   "The mixture hydrates when exposed to moisture"
    
3. Cause to be hydrated; add water or moisture to
   "hydrate your skin"

Type of: change, furnish, humidify, offer, provide, render, supply

Antonym: anhydrous, exsiccate

Encyclopedia: Hydrated