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
Even so, elevated solar activity often results in more vivid auroras and the potential for visibility farther south than usual.
—
Valerie Mesa, PEOPLE, 9 Dec. 2025
Green, blue, purple, pink and red hues can often be seen in auroras, with the color depending on the type of gas at play and where in the atmosphere such is located.
—Rachael O'Connor, MSNBC Newsweek, 9 Dec. 2025
Seeing the auroras as far south of Indianapolis, of course, depends on if the weather cooperates.
—John Tufts, IndyStar, 8 Dec. 2025
Use your phone camera to scan the sky, as a phone camera is great at picking up faint auroras before your eyes spot them.
—Daisy Dobrijevic, Space.com, 3 Dec. 2025
See All Example Sentences for aurora
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Valerie Mesa, PEOPLE, 9 Dec. 2025
Green, blue, purple, pink and red hues can often be seen in auroras, with the color depending on the type of gas at play and where in the atmosphere such is located.
—Rachael O'Connor, MSNBC Newsweek, 9 Dec. 2025
Seeing the auroras as far south of Indianapolis, of course, depends on if the weather cooperates.
—John Tufts, IndyStar, 8 Dec. 2025
Use your phone camera to scan the sky, as a phone camera is great at picking up faint auroras before your eyes spot them.
—Daisy Dobrijevic, Space.com, 3 Dec. 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 18 Dec. 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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