—v.i. 1. to make a humming, buzzing, or hissing sound, as an object passing swiftly through the air.
2. to move or rush with such a sound: The angry hornets whizzed by in a cloud.
—v.t. 1. to cause to whiz.
2. to treat with a whizzer.
—n. 1. Informal.a person who is quite good at a particular activity, in a certain field, etc.: She's a whiz at math. 2. the sound of a whizzing object.
3. a swift movement producing such a sound. Also,whizz.