phenomenon phenomenon /fəˈnɑːməˌnɑːn/

noun

1. () Any state or process known through the senses rather than by intuition or reasoning  ( phenomenon )
   any state or process known through the senses rather than by intuition or reasoning
   
2. () A remarkable development  ( phenomenon )
   a remarkable development
     The Northern Lights were a natural phenomenon that fascinated everyone.
   The Northern Lights were a natural phenomenon that fascinated everyone.