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Definition of aurora australis noun from the Oxford Advanced Learner's Dictionary

aurora australis

noun
 
/əˌrɔːrə ɒˈstreɪlɪs/
 
/əˌrɔːrə ɔːˈstreɪlɪs/
 [singular]
(also the Southern Lights [plural])
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  1. bands of coloured light that are sometimes seen in the sky at night in the most southern countries of the worldTopics Spacec2
See aurora australis in the Oxford Advanced American Dictionary
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halfway
adverb
 
 
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