LEARNit Dictionary
aurora borealis
noun
/əˌrɔːrə ˌbɔːriˈeɪlɪs/
UK
/əˌrɔːrə ˌbɔːriˈælɪs/
US
1
bands of coloured light, mainly green and red, that are sometimes seen in the sky at night in the most northern countries of the world
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