definition of
whimsy

[1] #1 whimsy n. [notion, whim, whimsey] an odd or fanciful or capricious idea; "the theatrical notion of disguise is associated with disaster in his stories"; "he had a whimsy about flying to the moon"; "whimsy can be humorous to someone with time to enjoy it". wn

[2] #2 whimsy n. [flightiness, arbitrariness, whimsicality, 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