phenomenon
🇺🇸
/fəˈnɑːmɪnən/
🇬🇧
/fəˈnɒmɪnən/
something that happens or exists in nature or society that is hard to explain
The northern lights are a natural phenomenon that many people travel to see.
a person or thing that is very successful or amazing
Her musical talent is a true phenomenon that surprises everyone.