phenomenon (EN)

noun

noun “phenomenon”

1. an occurrence, especially in nature or society, that is not completely explained
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   The sudden appearance of the bright, dancing lights in the northern sky, known as the aurora borealis, is a fascinating natural phenomenon.
2. (US) An extraordinary or exceptional person or thing
   The young chess prodigy, defeating seasoned grandmasters, was hailed as a phenomenon in the world of chess.