1. the quality or state of being playful, lively, and full of energy
Usage: often used to describe animals or people in a cheerful, spirited mood
2. the quality of being inclined to frisk or search someone, especially by police or security
Usage: less common; refers to the tendency or practice of conducting physical searches

Examples

• The puppies displayed remarkable friskiness as they chased each other around the yard.
• Her friskiness and cheerful attitude made her popular with her classmates.
• The young horse showed great friskiness, prancing and jumping in the pasture.
• After a good night's sleep, he woke up with unusual friskiness and energy.
• The children's friskiness during recess was a welcome break from their classroom work.