1. the process of adding fluoride to a public water supply to help prevent tooth decay
Usage: mass noun; commonly used in public health contexts

Examples

• Water fluoridation has been shown to reduce cavities in children by up to 25 percent.
• Many cities began fluoridation programs in the 1950s as a public health measure.
• The dentist explained that fluoridation of drinking water is one of the most effective ways to prevent tooth decay.
• Some communities have debated whether fluoridation should be mandatory.
• Fluoridation is recommended by the American Dental Association and the World Health Organization.