Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Physics A measure of the rate of rotational spin in a fluid.
  • n. Meteorology A measure of the spin of an air mass such as a low- or high-pressure weather system.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A property of a fluid related to local angular rotation

from The Century Dictionary and Cyclopedia

  • n. The state or condition of the rotating portions of a fluid in which vortex-motion occurs.

Etymologies

vortex +‎ -ity (Wiktionary)

Examples

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