Aurora
(lowercase)Meteorology. a radiant emission from the upper atmosphere that occurs sporadically over the middle and high latitudes of both hemispheres in the form of luminous bands, streamers, or the like, caused by the bombardment of the atmosphere with charged solar particles that are being guided along the earth's magnetic lines of force.
a city in central Colorado, near Denver.
a city in NE Illinois.
a female given name.
Origin of Aurora
1Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use Aurora in a sentence
Trailing slowly through the desert toward Aurorae Sinus, they passed near the skeleton bodies.
Rebels of the Red Planet | Charles Louis Fontenay
British Dictionary definitions for aurora (1 of 3)
/ (ɔːˈrɔːrə) /
an atmospheric phenomenon consisting of bands, curtains, or streamers of light, usually green, red, or yellow, that move across the sky in polar regions. It is caused by collisions between air molecules and charged particles from the sun that are trapped in the earth's magnetic field
poetic the dawn
Origin of aurora
1Derived forms of aurora
- auroral, adjective
- aurorally, adverb
British Dictionary definitions for Aurora (2 of 3)
/ (ɔːˈrɔːrə) /
the Roman goddess of the dawn: Greek counterpart: Eos
the dawn or rise of something
British Dictionary definitions for Aurora (3 of 3)
/ (ɔːˈrɔːrə) /
another name for Maewo
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for aurora
[ ə-rôr′ə ]
A brilliant display of bands or folds of variously colored light in the sky at night, especially in polar regions. Charged particles from the solar wind are channeled through the Earth's magnetic field into the polar regions. There the particles collide with atoms and molecules in the upper atmosphere, ionizing them and making them glow. Auroras are of greatest intensity and extent during periods of increased sunspot activity, when they often interfere with telecommunications on Earth.♦ An aurora that occurs in southern latitudes is called an aurora australis (ô-strā′lĭs) or southern lights. When it occurs in northern latitudes it is called an aurora borealis (bôr′ē-ăl′ĭs) or northern lights. See also magnetic storm.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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