1. the process or act of removing caffeine from coffee, tea, or other beverages

Examples

• The decaffeination process removes most of the caffeine from coffee beans.
• Many people prefer decaffeination methods that preserve the flavor of the coffee.
• Modern decaffeination techniques use water, solvents, or carbon dioxide.
• She switched to decaffeinated coffee after her doctor recommended decaffeination for health reasons.
• The decaffeination of tea is less common than that of coffee.