A vortex is a mass of fluid or air in a rapid rotational movement towards a point.
Vortexes are relatively common in nature; for example, a whirlpool in water or a tornado in air.
In the context of paranormal events, a vortex usually refers to some type of mysterious disturbance in the fabric of space and/or time.
It sometimes means an opening to another realm or dimension. Vortexes are often said to be uncontrolled and dangerous.
Occasionally, anomalies in photographs are explained as vortexes.
See also: Vile Vortices