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
Synonyms
Examples of aurora in a Sentence
a gorgeous pink aurora aroused us out of our slumber
Recent Examples on the Web
While there's no guarantee, this geomagnetic storm could make for an unforgettable Valentine's Day under the dancing auroras.
—
Daisy Dobrijevic, Space.com, 12 Feb. 2025
This year marks the peak of the current solar cycle, promising some of the most dramatic auroras in a decade.
—Passport By Forbeslife, Forbes, 17 Jan. 2025
Pettit captured this time-lapse of the aurora from the International Space Station (ISS), where he's been stationed since September.
—Stefanie Waldek, Travel + Leisure, 10 Jan. 2025
One such storm in May 2024 even brought the aurora as far south as Hawaii.
Mark Miesch, a researcher with NOAA’s Space Weather Prediction Center, previously told Nexstar that solar maximum can last for about two years or even more.
—Addy Bink, The Hill, 5 Jan. 2025
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Daisy Dobrijevic, Space.com, 12 Feb. 2025
This year marks the peak of the current solar cycle, promising some of the most dramatic auroras in a decade.
—Passport By Forbeslife, Forbes, 17 Jan. 2025
Pettit captured this time-lapse of the aurora from the International Space Station (ISS), where he's been stationed since September.
—Stefanie Waldek, Travel + Leisure, 10 Jan. 2025
One such storm in May 2024 even brought the aurora as far south as Hawaii.
Mark Miesch, a researcher with NOAA’s Space Weather Prediction Center, previously told Nexstar that solar maximum can last for about two years or even more.
—Addy Bink, The Hill, 5 Jan. 2025
See all Example Sentences for aurora
Dictionary Entries Near aurora
Cite this Entry
“Aurora.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aurora. Accessed 19 Feb. 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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