What does aurorae mean?
Aurorae are the shimmering curtains and arcs of colored light that occasionally illuminate the night sky, most famously at high northern and southern latitudes. The word is simply the plural of "aurora," itself borrowed from the name of the Roman goddess of dawn. Aurorae occur when charged particles from the sun collide with gases in Earth's upper atmosphere, producing greens, reds, purples, and blues that ripple across the darkness. In everyday English, the anglicized plural "auroras" has largely displaced "aurorae," so the Latinate form now signals a formal, scientific, or literary register. Writers use it to evoke wonder: descriptions of aurorae appear frequently in travel writing, poetry, and accounts of expeditions to the Arctic and Antarctic. Because the phenomenon is tied to solar activity, mentions of aurorae often accompany discussion of geomagnetic storms, making the word useful for readers interested in astronomy, physics, and the dramatic beauty of the polar night.
nounThe plural of "aurora": natural displays of colored light in the night sky, especially near the polar regions, caused by charged particles from the sun interacting with the upper atmosphere.
- Plural of aurora: multiple natural luminous phenomena appearing in the sky near the poles, produced when charged particles from the sun excite gases in the upper atmosphere.
"During the solar maximum, brilliant aurorae were visible as far south as the Mediterranean."
"Photographers traveled to Tromsø hoping to capture vivid aurorae dancing across the Arctic sky."
"Scientists monitoring geomagnetic activity predicted strong aurorae over both hemispheres that weekend."
This IS the plural form of "aurora" — the classical Latinate plural. Modern usage increasingly prefers the anglicized "auroras," but "aurorae" remains standard in formal and scientific writing.
"Vivid aurorae were recorded across Scandinavia during the geomagnetic storm."
When the sun erupts, aurorae can flare up thousands of miles beyond their usual polar homes — turning the sky green and crimson over places that rarely see them.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of aurorae
"Aurorae" is the plural of "aurora," a Latin word meaning "dawn" or "daybreak." The Romans personified this daily event as Aurora, goddess of the morning, who was said to renew herself each day and fly across the sky ahead of the sun. The term entered scientific English in the early modern period, when natural philosophers applied it to the mysterious polar lights, coining "aurora borealis" ("northern dawn") in the early 17th century. It shares its ultimate root with related words evoking morning light and the east, such as "auroral" and "orient."
Related word forms
How aurorae is actually used
"Aurorae" is the Latinate plural; in modern scientific and everyday usage, the anglicized plural "auroras" is more common. "Aurorae" tends to appear in formal, literary, or historical writing.
Easily confused with aurorae
"Aurora" is the singular form referring to one light display (or the Roman goddess of dawn), while "aurorae" is its Latin-style plural referring to multiple such displays.