|1.||[ noun ] a sudden desire|
|Synonyms:||impulse vagary caprice|
"he bought it on impulse"
|2.||[ noun ] an odd or fanciful or capricious idea|
|Synonyms:||notion whimsey whimsy|
"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"