1.Definition: bringing or deserving severe rebuke or censure

"A criminal waste of talent"

Related Adjective(s):condemnable, deplorable, reprehensible, vicious

2.Definition: guilty of crime or serious offense

"Criminal in the sight of God and man"

3.Definition: involving or being or having the nature of a crime

"A criminal offense", "Criminal abuse"

Related Adjective(s):felonious