Noun perkiness has 2 senses

• perkiness(n = noun.feeling) buoyancy - cheerfulness that bubbles to the surface; Array
is a kind of blitheness, cheerfulness
Derived form adjective perky₁

• perkiness(n = noun.attribute) archness, impertinence, pertness, sauciness - inappropriate playfulness; Array
is a kind of fun, playfulness