The definition of aurora borealis is a well known light display in the Northern Hemisphere created by colliding charged particles in the atmosphere.(noun)
An example of Aurora Borealis is the light display also known as the Northern Lights.
See aurora borealis in Webster's New World College Dictionary
Origin: L, lit., northern aurora: see Aurora & Boreas
See aurora borealis in American Heritage Dictionary 4
noun pl. aurora bo·re·al·is·es (-ĭ-sĭz) or aurorae borealis
Origin: New Latin aurōra boreālis
Origin: : Latin aurōra, dawn
Origin: + Latin boreālis, northern.
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