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
If conditions cooperate, auroras could become visible across higher-latitude regions including much of Alaska and Canada, along with parts of the northern United States.
—
Valerie Mesa, PEOPLE, 7 May 2026
Tonight, April 30, a high-speed stream of solar wind may escalate geomagnetic activity, resulting in auroras as far south as Illinois.
—Michele Laufik, Martha Stewart, 30 Apr. 2026
Typical pulsating aurora displays last 10 to 20 minutes, but Kerss had captured almost three hours of extreme pulsating auroras — an unusually powerful display and one of the longest on record, according to the statement.
—Daisy Dobrijevic, Space.com, 28 Apr. 2026
If that happens, minor geomagnetic storms and bright auroras could follow.
—Neetika Walter, Interesting Engineering, 24 Apr. 2026
See All Example Sentences for aurora
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Valerie Mesa, PEOPLE, 7 May 2026
Tonight, April 30, a high-speed stream of solar wind may escalate geomagnetic activity, resulting in auroras as far south as Illinois.
—Michele Laufik, Martha Stewart, 30 Apr. 2026
Typical pulsating aurora displays last 10 to 20 minutes, but Kerss had captured almost three hours of extreme pulsating auroras — an unusually powerful display and one of the longest on record, according to the statement.
—Daisy Dobrijevic, Space.com, 28 Apr. 2026
If that happens, minor geomagnetic storms and bright auroras could follow.
—Neetika Walter, Interesting Engineering, 24 Apr. 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 13 May. 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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