noun🔗ShareAuroreAn atmospheric phenomenon created by charged particles from the sun striking the upper atmosphere, creating coloured lights in the sky. It is usually named australis or borealis based on whether it is in the Southern or Northern Hemisphere respectively."Last winter, my family traveled to Iceland hoping to see the aurora borealis dance across the night sky. "L'hiver dernier, ma famille a voyagé en Islande dans l'espoir de voir l'aurore boréale danser dans le ciel nocturne.astronomyweatherspacenaturephenomenaenvironmentsciencephysicsChat with AIVocabulary GamePractice Reading