villain

n. scoundrel, wicked person; scoundrel in a story or play

A villain is an "evil" character in a story, whether an historical narrative or, especially, a work of fiction. The villain is the bad guy, the characters who fight against the hero. A female villain is sometimes called a villainess.A villain's disposition towards evil distinguishes them from an antagonist. For example, Javert in Les Miserables is an antagonist: He opposes the hero, but does so by such means and under such pretexts as not to become entirely odious to the reader; a villain may, in fact, even repent, be redeemed, or become a "good guy" in the end. (A villain is virtually always an antagonist, but an antagonist is not always a villain.) The villain is also distinct from the anti-hero, a character who violates the law or the prevailing social standards, but who nevertheless has the audience's sympathy (and may be or become good-hearted), and is therefore the real hero of the story. Sometimes, a villain may even appear as the protagonist of a story, while the hero who opposes them may be the antagonist.
See more at Wikipedia.org...

(v. t.)
To debase; to degrade.
  

(n.)
One who holds lands by a base, or servile, tenure, or in villenage; a feudal tenant of the lowest class, a bondman or servant.
  

(n.)
A vile, wicked person; a man extremely depraved, and capable or guilty of great crimes; a deliberate scoundrel; a knave; a rascal; a scamp.
  

(n.)
A baseborn or clownish person; a boor.
  

(a.)
Villainous.
  

Noun
1. a wicked or evil person; someone who does evil deliberately
(synonym) scoundrel
(hypernym) unwelcome person, persona non grata
(hyponym) cad, bounder, blackguard, dog, hound, heel
2. the principle bad character in a film or work of fiction
(synonym) baddie
(hypernym) character, role, theatrical role, part, persona