plural auroras or aurorae
ə-ˈrȯr-(ˌ)ē 
ȯ-
1
: dawn
2
capitalized
: the Roman goddess of dawn compare eos
3
: a luminous phenomenon that consists of streamers or arches of light appearing in the upper atmosphere of a planet's magnetic polar regions and is caused by the emission of light from atoms excited by electrons accelerated along the planet's magnetic field lines
Examples of aurora in a Sentence
a gorgeous pink aurora aroused us out of our slumber
Recent Examples on the Web
Together, these space weather events could produce Minor Geomagnetic Storm (G1) conditions, meaning the aurora could become visible in northern parts of Canada, Alaska, Scandinavia, and other high-latitude regions.
—
Daisy Dobrijevic, Space.com, 7 May 2025
For the best viewing experience, try to catch the auroras between 10 p.m. and 2 a.m. local time, preferably facing north from a high spot away from the city lights, as recommended by NOAA.
—Valerie Mesa, People.com, 6 May 2025
The Earth's magnetic field guides the electrons so that the aurora forms two ovals centered around the magnetic poles.
—Ross Rosenfeld, MSNBC Newsweek, 22 Apr. 2025
The geomagnetic storm on May 10, 2024, which saw aurora as far south as Florida, was rated a G5.
—Jamie Carter, Forbes.com, 20 Apr. 2025
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Daisy Dobrijevic, Space.com, 7 May 2025
For the best viewing experience, try to catch the auroras between 10 p.m. and 2 a.m. local time, preferably facing north from a high spot away from the city lights, as recommended by NOAA.
—Valerie Mesa, People.com, 6 May 2025
The Earth's magnetic field guides the electrons so that the aurora forms two ovals centered around the magnetic poles.
—Ross Rosenfeld, MSNBC Newsweek, 22 Apr. 2025
The geomagnetic storm on May 10, 2024, which saw aurora as far south as Florida, was rated a G5.
—Jamie Carter, Forbes.com, 20 Apr. 2025
See All Example Sentences for aurora
Cite this Entry
“Aurora.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aurora. Accessed 16 May. 2025.
Copy CitationGeographical Definition
Aurora
geographical name
Au·ro·ra
ə-ˈrȯr-ə
ȯ-
1
city in north central Colorado east of Denver population 325,078
2
city west of Chicago in northeastern Illinois population 197,899
3
town north of Toronto in southeastern Ontario, Canada population 53,203
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