Felony is a major crime that can be punished more than one year in prison. A person who has committed a felony is called a "felon". Usually, countries have a discrimination for serious crimes and less serious crimes. As in many states in the United States, where the felony/misdemeanor distinction is exist, it is classified as a misdemeanor if the punishment is less than one year.
A list of crimes that can be classified as a felony
A list of crimes that can be classified as a felony