Fe*lo"ni-ous (?), a.
Having the quality of felony; malignant; malicious; villainous; traitorous; perfidious; in a legal sense, done with intent to commit a crime; as, felonious homicide.
O thievish Night,
Why should'st thou, but for some felonious end,
In thy dark lantern thus close up the stars?
-- Fe*lo"ni-ous-ly, adv. -- Fe*lo"ni-ous*ness, n.
© Webster 1913.