vil ‧ lain /ˈvɪlən/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: vilain 'peasant' , from Medieval Latin vilanus , from Latin villa ; ⇨ ↑ villa ]
1 . the main bad character in a film, play, or story
2 . the villain of the piece the person or thing that has caused all the trouble in a particular situation
3 . informal a bad person or criminal