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
The aurora borealis will be most visible in Alaska and northern Canada, with a minimal opportunity, marked by NOAA’s view line, expected in several states along the Canadian border.
—
Ty Roush, Forbes.com, 19 May 2025
Those storms hurl particles and radiation into space, producing spectacular auroras on Earth — but also can disrupt some technical infrastructure and satellites.
—Paul Smaglik, Discover Magazine, 24 Apr. 2025
Join 32 others in the comments View Comments Increased solar activity causes auroras that dance around Earth’s poles, known as the northern lights, or aurora borealis, and southern lights, or aurora australis.
—Ashley Strickland, CNN Money, 16 Apr. 2025
As for stargazing, Voyageurs offers visitors a rare opportunity to glimpse the aurora borealis in the lower 48.
—Bailey Berg, AFAR Media, 14 Apr. 2025
See All Example Sentences for aurora
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Ty Roush, Forbes.com, 19 May 2025
Those storms hurl particles and radiation into space, producing spectacular auroras on Earth — but also can disrupt some technical infrastructure and satellites.
—Paul Smaglik, Discover Magazine, 24 Apr. 2025
Join 32 others in the comments View Comments Increased solar activity causes auroras that dance around Earth’s poles, known as the northern lights, or aurora borealis, and southern lights, or aurora australis.
—Ashley Strickland, CNN Money, 16 Apr. 2025
As for stargazing, Voyageurs offers visitors a rare opportunity to glimpse the aurora borealis in the lower 48.
—Bailey Berg, AFAR Media, 14 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 28 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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