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

  • n. A discharge of blue light that starts from the top of active thunderstorm clouds and proceeds upwards. Also called reverse lightning.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. atmospheric discharges (lasting 10 msec) bursting from the tops of giant storm clouds in blue cones that widen as they flash upward


Sorry, no etymologies found.


    Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.

  • Scientists from the University of Alaska were studying a massive hailstorm in Arkansas from a plane when they saw rays of blue light discharging far above the tops of clouds. The rays were traveling at 216,000 mph. Blue jets are rare and are barely seen with the naked eye. They may be linked to powerful hailstorms.

    September 23, 2007