plural auroras or aurorae
ə-ˈrȯr-(ˌ)ē 
ȯ-
1
: dawn
2
Aurora
: 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
Depending on the intensity of the storm conditions, auroras may be visible in states as far south as Oregon, Wyoming, Iowa, Illinois, New York, Vermont, and New Hampshire.
—
Michele Laufik, Martha Stewart, 12 June 2026
Still, auroras are notoriously fickle and can appear earlier or later depending on how the solar material interacts with Earth’s magnetic field.
—Valerie Mesa, PEOPLE, 12 June 2026
But Meir made good use of her temporary surroundings, capturing truly incredible images (and even video) of auroras over Earth from the Dragon.
—Chelsea Gohd, Space.com, 9 June 2026
Notably, the forecast arrival times of CMEs can change by hours, which could lead to brighter-than-expected auroras in the sky Monday night.
—Connor Greene, Time, 8 June 2026
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Michele Laufik, Martha Stewart, 12 June 2026
Still, auroras are notoriously fickle and can appear earlier or later depending on how the solar material interacts with Earth’s magnetic field.
—Valerie Mesa, PEOPLE, 12 June 2026
But Meir made good use of her temporary surroundings, capturing truly incredible images (and even video) of auroras over Earth from the Dragon.
—Chelsea Gohd, Space.com, 9 June 2026
Notably, the forecast arrival times of CMEs can change by hours, which could lead to brighter-than-expected auroras in the sky Monday night.
—Connor Greene, Time, 8 June 2026
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 Jun. 2026.
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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