1. the quality of being lively, cheerful, and energetic

Examples

• Her perkiness in the morning annoyed her grumpy roommate.
• The coffee’s perkiness helped him get through the long meeting.
• Despite the rainy weather, she maintained her usual perkiness.
• The puppy’s perkiness made everyone smile.
• His perkiness seemed forced after the disappointing news.
• The cheerleader’s perkiness energized the entire crowd.