aurora[ɔ:'rɔ:rə]
noun(pluralaurorasoraurorae-ri:)
1the northern lights (aurora borealis) or southern lights (aurora australis), a natural phenomenon characterized by the appearance of streamers of coloured light in the sky near the earth's magnetic poles and caused by the interaction of charged particles from the sun with atoms in the upper atmosphere.
2literarythe dawn.
Derivatives
auroraladjective
Origin
ME: from L., 'dawn, goddess of the dawn'.