A whirling or circular motion of water; a whirling of the air; a whirlwind. In the Cartesian system, the theory of a collection of particles of matter forming an ether or fluid, endowed with a rapid rotatory motion around an axis, as accounting for the planetary revolutions.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (s. & pl.) (singular, plural)
The spiral arrangement of the muscle fibres at the apex of the heart.
- A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920. (noun) (n.) (noun)
- The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919. (adjective) (adj.) (adjective)
A whirlpool; whirlwind.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (noun) (n.) (noun)
Air or water with a circular current tending to suck bodies caught in it into a depression, or vacuum, at the center; an eddy or whirlpool.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
A whirling motion of a fluid forming a cavity in the centre: a whirlpool: a whirlwind:- pl. VORTICES.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)

Usage examples:

He has not expelled him; but I fancied this, on account of this Vortex here.
- The Clouds by Aristophanes
The frenzied waters form a seething vortex the terror of the most daring navigators."
- See America First by Orville O. Hiestand
The power of the " invisible empire" established by Lenine and Trotzky can be traced in the quotations in this book as a great dramatic energy which has seized and dragged into its vortex one after another of the radical organizations in the United States until none are now left out, and some even of the comparatively conservative trades union bodies appear to be trembling on the verge of peril.
- The Red Conspiracy by Joseph J. Mereto