1. the quality or state of being cool in temperature
2. calmness and composure, especially in difficult situations
3. the quality of being fashionable, impressive, or socially acceptable
Usage: informal

Examples

• The coolness of the morning air was refreshing.
• She admired his coolness under pressure during the crisis.
• The teenager was impressed by the coolness of the new sneakers.
• There was a noticeable coolness in her voice when she spoke to him.
• The coolness of the cave provided relief from the summer heat.
• His coolness in the face of danger saved everyone.
• The coolness of the restaurant made it popular with young people.