crim·i·nal 
(krĭmə-nəl)
(krĭmə-nəl)adj.
1. Of, involving, or having the nature of crime: criminal abuse.
2. Relating to the administration of penal law.
3.
a. Guilty of crime.
b. Characteristic of a criminal.
4. Shameful; disgraceful: a criminal waste of talent.
n.
One that has committed or been legally convicted of a crime.
[Middle English, from Old French criminel, from Late Latin crīminālis, from Latin crīmen, crīmin-, accusation; see CRIME.]
crimi·nal·ly adv.