Main entry: whimsey, whimsicality, whimsy, arbitrariness, capriciousness, flightiness
Definition: the trait of acting unpredictably and more from whim or caprice than from reason or judgment
Usage: I despair at the flightiness and whimsicality of my memory
Main entry: notion, whim, whimsey, whimsy
Definition: an odd or fanciful or capricious idea
Usage: 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