Felony. The act or offense by which a vassal forfeited his fee. Spelman;Calvin. Per feloniam. with a criminal intention. Co. Litt. 391.Felonla, ex vi termini significat quod- libet capitale crimen felleo animo perpetratum.Co. Litt. 391. Felony, by force of the term, signifies any capital crime perpetratedwith a malignant mind.Felonia implicatur in qualibet pro- ditione. 3 Inst 15. Felony is implied in everytreason.