definition of
whimsicality

[1] #1 whimsicality n. [flightiness, arbitrariness, whimsy, whimsey, capriciousness] the trait of acting unpredictably and more from whim or caprice than from reason or judgment; "I despair at the flightiness and whimsicality of my memory". wn

[2] #2 whimsicality n. [impishness, mischievousness, puckishness] the trait of behaving like an imp. wn