Origin: From Sp. Or Pg. Tornar to turn, return, L. Tornare to turn, hence, a whirling wind. The Sp. & Pg. Tornada is a return. See Turn.
(Science: meteorology) A violent whirling wind; specifically, a tempest distinguished by a rapid whirling and slow progressive motion, usually accompaned with severe thunder, lightning, and torrents of rain, and commonly of short duration and small breadth; a small cyclone.