What is the definition of varoom?

"Vroom" is not a word with a formal definition in the dictionary. It's an onomatopoeia - a word that imitates the sound it represents.

Specifically, "vroom" is used to represent the sound of an engine accelerating, often in a car or motorcycle. It can also be used playfully to describe the sound of other things, like a rocket launching or a lawnmower starting.

Here are some examples of how "vroom" is used:

* "The car roared to life with a vroom and sped away."

* "The little boy pretended his toy car was making a vroom sound as he pushed it across the floor."

* "The rocket ship blasted off with a powerful vroom."

So, while "vroom" doesn't have a formal definition, its meaning is clear and universally understood: it's the sound of something powerful accelerating.