[ uh-rawr-uh, uh-rohr-uh ]
/ əˈrɔr ə, əˈroʊr ə /
noun, plural au·ro·ras, au·ro·rae [uh-rawr-ee, uh-rohr-ee] /əˈrɔr i, əˈroʊr i/ for defs 2, 3.
the ancient Roman goddess of the dawn.Compare Eos.
(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.
QUIZ TIME: TEST YOUR MEMORY OF THE MAY 2020 WORDS OF THE DAY
Let the aeolian gusts transport you back to these popular Words of the Day from the month of May. How many do you remember?
Question 1 of 10
Which of the following words means “to travel or journey, especially to walk on foot”?
Origin of Aurora
1350–1400; Middle English < Latin aurōra dawn, dawn goddess, east
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for aurorae (1 of 3)
/ (ɔːˈrɔːrə) /
noun plural -ras or -rae (-riː)
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
Derived forms of auroraauroral, adjectiveaurorally, adverb
Word Origin for aurora
C14: from Latin: dawn; see east
British Dictionary definitions for aurorae (2 of 3)
/ (ɔːˈrɔːrə) /
the Roman goddess of the dawnGreek counterpart: Eos
the dawn or rise of something
British Dictionary definitions for aurorae (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 aurorae
[ ə-rôr′ə ]
Plural auroras aurorae (ə-rôr′ē)
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.