Aurora Borealis Definition

bôrē-ălĭs

aurora-borealis

noun

An aurora that occurs in northern regions of the earth.

American Heritage

Irregular, luminous phenomena, as streamers, visible at night in a zone surrounding the north magnetic pole and produced in the ionosphere when atomic particles strike and excite atoms; northern lights.

Webster's New World

The aurora of the northern hemisphere.

Wiktionary

Synonyms:

Synonyms:
northern-lights

Origin of Aurora Borealis

From New Latin aurora borealis, from Latin Aurora (“Roman goddess of the dawn”) + borealis (“northern”)

From Wiktionary
New Latin aurōra boreālis Latin aurōra dawn Latin boreālis northern

From American Heritage Dictionary of the English Language, 5th Edition