From Longman Dictionary of Contemporary Englishaurora borealisau‧ro‧ra bo‧re‧a‧lis /əˌrɔːrə bɔːriˈeɪləs, ɔː- $ -ˈæl-/ noun [singular] HAthe Northern Lights
Examples from the Corpus
aurora borealis• The sky was aflame with the aurora borealis, the eerily luminous northern lights.• The aurora borealis was like that, too.Origin aurora borealis (1700-1800) Modern Latin “northern dawn” 