1. the quality of being warm, friendly, and enthusiastic
2. the quality of being vigorous, robust, or in good health
3. the quality of being substantial, filling, or nourishing (of food or a meal)

Examples

• The heartiness of her greeting made everyone feel welcome.
• He ate with heartiness, enjoying every bite of the meal.
• The heartiness of the old sailor's laugh echoed across the dock.
• She appreciated the heartiness of the stew on a cold winter day.
• His heartiness and good humor made him popular among his colleagues.
• The heartiness of the applause showed the audience's genuine appreciation.