1. the quality of being intoxicating or causing dizziness
2. the quality of being exciting or exhilarating in a way that affects judgment
3. the quality of being rash or impetuous

Examples

• The headiness of the wine made her feel lightheaded.
• She was overwhelmed by the headiness of her first success.
• The headiness of young love clouded his judgment.
• The mountain air had a certain headiness that energized the hikers.
• His headiness in making decisions often led to mistakes.
• The headiness of the moment made them forget their worries.
• The perfume’s headiness filled the entire room.