1.nounA violent windstorm of limited extent, as the tornado, characterized by an inward spiral motion of the air with an upward current in the center; a vortex of air. It usually has a rapid progressive motion.
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."
3.adjectiveRapid and minimal: a whirlwind tour, a whirlwind romance.