felony /ˈfɛləni/ noun1 •(US) A serious criminal offense, which, under United States federal law, is punishable by a term of imprisonment of not less than one year or by the death penalty in the most serious offenses.There shall be in England, seuen halfe peny Loaues sold for a peny: the three hoop'd pot, shall haue ten hoopes, and I vvill make it Fellony to drink small Beere. — 1591 formsfelonies