1. plural of bounciness; the quality or state of being bouncy; the ability to bounce or spring back readily
Usage: typically uncountable in singular form; plural used when referring to multiple instances or types of bouncy behavior
2. plural of bounciness; liveliness, energy, or cheerful enthusiasm
Usage: informal; refers to a person's animated or spirited manner

Examples

• The bouncinesses of different types of rubber balls vary significantly.
• Her natural bouncinesses and cheerful attitude made her popular with the team.
• The mattress's bouncinesses decreased after years of use.
• Children love toys with high bouncinesses that spring back quickly.
• The dancer's bouncinesses in every step showed her joy and energy.