|1.||[ noun ] an unexpected and inexplicable change in something (in a situation or a person's behavior, etc.)|
"the vagaries of the weather" "his wealth fluctuates with the vagaries of the stock market" "he has dealt with human vagaries for many years"
|2.||[ noun ] a sudden desire|
|Synonyms:||impulse whim caprice|
"he bought it on impulse"