whim whim /ˈhwɪm/

noun

1. () A sudden desire  ( caprice , whim , impulse )
   a sudden desire
    He bought it on an impulse
   he bought it on an impulse
   
2. An odd, fanciful or capricious idea  ( whim , whimsey , whimsy , notion )
   an odd, fanciful or capricious idea
    The theatrical notion of disguise is associated with disaster in his stories
   the theatrical notion of disguise is associated with disaster in his stories
    He had a whimsy about flying to the moon
   he had a whimsy about flying to the moon
    Whimsy can be humorous to someone with time to enjoy it
   whimsy can be humorous to someone with time to enjoy it