Definitions

1. noun

a whimsical or unpredictable idea, action, or occurrence

“Her sudden decision to travel the world was a vagary that surprised everyone.”

2. noun

a flighty or unpredictable quality

“The vagary of the weather made it difficult to plan outdoor activities.”

3. verb

to behave in a whimsical or unpredictable manner

“The child was vagaring around the store, picking up random toys.”