1.NounA windstorm of limited extent, such as a tornado, dust devil, or waterspout, characterized by an inward spiral motion of the air with an upward current in the center; a vortex of air.
2.NounA person or body of objects or events sweeping violently onward.
"Once he got that new scooter he turned into a whirlwind and damaged all the flowers.; The weeks leading up to the convention were a whirlwind of preparation and hurried activity.; swept up in the whirlwind of war"