- a whirlwind that forms over a dry and dusty area, picking up dust, sand, leaves, and debris: a dust whirl can be as minor as a very small eddy that circulates dried leaves by the side of the road or as vigorous as a dust devil, and occasionally can be the first visible sign of an imminent tornado: Mama taught us to respect the omens of ill weather and never to trust the innocence of a little dust whirl.
