1. (

• notion ,
• whim ,
• whimsy ,
• 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" ;

2. (

• flightiness ,
• arbitrariness ,
• whimsicality ,
• 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" ;