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
Outside North America, both aurora borealis and aurora australis were seen in abundance.
—
Jamie Carter, Forbes.com, 3 June 2025
The northern lights, also known as the aurora borealis, may be visible in northern states, according to the NOAA.
—Julia Gomez, USA Today, 2 June 2025
While Sunday night marked the peak of this celestial event, residents along the Canadian border -- from Washington state to Michigan's Upper Peninsula -- might still catch glimpses of the aurora borealis low on the horizon Monday night.
—Doc Louallen, ABC News, 2 June 2025
Aside from the spectacular display of vibrant colors that light up the night sky up above, the best part about the aurora borealis is that little to no technology is needed to spot them from Earth.
—Skyler Caruso, People.com, 2 June 2025
See All Example Sentences for aurora
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Jamie Carter, Forbes.com, 3 June 2025
The northern lights, also known as the aurora borealis, may be visible in northern states, according to the NOAA.
—Julia Gomez, USA Today, 2 June 2025
While Sunday night marked the peak of this celestial event, residents along the Canadian border -- from Washington state to Michigan's Upper Peninsula -- might still catch glimpses of the aurora borealis low on the horizon Monday night.
—Doc Louallen, ABC News, 2 June 2025
Aside from the spectacular display of vibrant colors that light up the night sky up above, the best part about the aurora borealis is that little to no technology is needed to spot them from Earth.
—Skyler Caruso, People.com, 2 June 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 6 Jun. 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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