from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Intermittent flashes of light near the horizon, usually seen on a hot summer evening, unaccompanied by thunder and thought to be cloud reflections of distant lightning.
from the GNU version of the Collaborative International Dictionary of English
- n. more or less vivid and extensive flashes of electric light, without thunder, seen near the horizon, esp. at the close of a hot day.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. bright flashes of light near the horizon without thunder (especially on hot evenings); usually attributed to distant lightning that is reflected by clouds
Sorry, no etymologies found.