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
However, the aurora is always present in the upper atmosphere.
—
Jamie Carter, Forbes, 19 Mar. 2025
In rare cases, large solar events can cause the aurora to be visible in regions that don't typically experience it, including as far south as the U.S., Europe and Asia, according to the NOAA.
—Mark Davis, Newsweek, 14 Mar. 2025
Winter’s darkness allows the aurora to shine bright in these remote locales
By Stefanie Waldek
All products featured on Architectural Digest are independently selected by our editors.
—Stefanie Waldek, Architectural Digest, 14 Mar. 2025
That means a better chance for dazzling auroras, so keep an eye on the skies and get your camera gear ready!
—Daisy Dobrijevic, Space.com, 4 Mar. 2025
See All Example Sentences for aurora
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Jamie Carter, Forbes, 19 Mar. 2025
In rare cases, large solar events can cause the aurora to be visible in regions that don't typically experience it, including as far south as the U.S., Europe and Asia, according to the NOAA.
—Mark Davis, Newsweek, 14 Mar. 2025
Winter’s darkness allows the aurora to shine bright in these remote locales
By Stefanie Waldek
All products featured on Architectural Digest are independently selected by our editors.
—Stefanie Waldek, Architectural Digest, 14 Mar. 2025
That means a better chance for dazzling auroras, so keep an eye on the skies and get your camera gear ready!
—Daisy Dobrijevic, Space.com, 4 Mar. 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 29 Mar. 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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