from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An aurora that occurs in northern regions of the earth. Also called northern lights.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The aurora of the northern hemisphere
from the GNU version of the Collaborative International Dictionary of English
- n. A luminous meteoric phenomenon, visible only at night, and supposed to be of electrical origin. This species of light usually appears in streams, ascending toward the zenith from a dusky line or bank, a few degrees above the northern horizon; when reaching south beyond the zenith, it forms what is called the corona, about a spot in the heavens toward which the dipping needle points. Occasionally the aurora appears as an arch of light across the heavens from east to west. Sometimes it assumes a wavy appearance, and the streams of light are then called merry dancers. They assume a variety of colors, from a pale red or yellow to a deep red or blood color.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the aurora of the northern hemisphere
New Latin aurōra boreālis : Latin aurōra, dawn + Latin boreālis, northern.(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin aurora borealis, from Latin Aurora ("Roman goddess of the dawn") + borealis ("northern") (Wiktionary)