The Northern Lights are a beautiful natural phenomenon.
strange phenomenon
Frequency:
45
%
The crop circles were a strange phenomenon that baffled scientists.
phenomenon of interest
Frequency:
35
%
The sudden increase in UFO sightings became a phenomenon of interest for the media.
Idiomatic Expressions for phenomenon
Phrase: the bystander effect phenomenon
Meaning: a social psychological phenomenon where individuals are less likely to help a person in need when others are present
Usage: The bystander effect phenomenon was studied extensively after the infamous case of Kitty Genovese.