adjective
- Law. pertaining to, of the nature of, or involving a felony: felonious homicide; felonious intent.
- wicked; base; villainous.
adjective
- criminal law of, involving, or constituting a felony
- obsolete wicked; base
mid-15c. (implied in feloniously), from felony + -ous. Replaced felonous (mid-14c.) by c.1600. Felonly (c.1300) was another variation.