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
That said, don't forget to glance around — auroras can pop up in front, behind, or right overhead.
—
Daisy Dobrijevic, Space.com, 26 June 2025
The northern lights, also known as the aurora borealis, may be visible in as many as 15 northern states between Tuesday night, June 24 and Wednesday night, June 25, according to NOAA's Space Weather Prediction Center (SWPC).
—Julia Gomez, USA Today, 25 June 2025
Watertown, Potsdam, Lake Placid and Plattsburgh were all within the potential aurora viewing area, according to the Space Weather Prediction Center.
—Joseph Wilkinson, New York Daily News, 24 June 2025
The 14-day journeys are aboard ships outfitted with vessel-wide aurora alerts to tell passengers when the northern lights are visible.
—Katie Nadworny, Travel + Leisure, 20 June 2025
See All Example Sentences for aurora
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Daisy Dobrijevic, Space.com, 26 June 2025
The northern lights, also known as the aurora borealis, may be visible in as many as 15 northern states between Tuesday night, June 24 and Wednesday night, June 25, according to NOAA's Space Weather Prediction Center (SWPC).
—Julia Gomez, USA Today, 25 June 2025
Watertown, Potsdam, Lake Placid and Plattsburgh were all within the potential aurora viewing area, according to the Space Weather Prediction Center.
—Joseph Wilkinson, New York Daily News, 24 June 2025
The 14-day journeys are aboard ships outfitted with vessel-wide aurora alerts to tell passengers when the northern lights are visible.
—Katie Nadworny, Travel + Leisure, 20 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 30 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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