Felony n. : An act on the part of the vassal which cost him his fee by forfeiture.

Felony n. : An offense which occasions a total forfeiture either lands or goods, or both, at the common law, and to which capital or other punishment may be added, according to the degree of guilt.

Felony n. : A heinous crime; especially, a crime punishable by death or imprisonment.

Example:
What is the difference between a capital Felony and a life Felony?

Taxonomy
felony, Crimes, states, distinction, punishment, possession, conviction, free encyclopedia, expungement, Crimes against property, felons, loss, felony conviction, offense, the common law, misdemeanor, United States, serious crimes.

Defination from the web:
felony is a serious crime in the United States and previously other common law countries. ... Broadly, felonies can be categorized as either violent or non-violent (property and drug) offenses. ... In addition, some states consider a felony conviction to be grounds for an uncontested divorce. ...