noun
[ pl. ] (also aur·ora bor·ealis ) 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
noun
[ pl. ] (also aur·ora bor·ealis ) 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
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005