An offense that is the most serious crime category. Felonies are divided into five classes: "A", "B", "C", "D", and "E." An "A" felony is the most serious, and an "E" felony is the least serious. The class determines the permissible sentence and prison terms in excess of one year that may, and sometimes must, be imposed. Examples of felonies are robbery, burglary, grand larceny, sale of narcotics, and murder. Under New York law, persons may not be charged with a felony unless indicted by a Grand Jury, although that right may be waived.