A crime is an action that breaks the law. People who do crimes can be punished by police or courts.
He was arrested for a serious crime.
Stealing is a common crime in big cities.
People sometimes use crime to mean a bad or unfair action. This meaning is more about feelings and morals, not always law.
It is a crime to waste water.
Not helping others can be seen as a crime.
Sometimes crime is used to show strong feelings. It means something is very wrong or sad in the speaker's view.
It's a crime to pollute the air.
Not sharing food is a crime in my family.
Crime can also mean the area or actions where illegal acts happen. News talks about crime to mean bad events.
Crime is rising in the city center.
The police reported a crime near my house.