Definition of villain noun from the Oxford Advanced American Dictionary

     

    villain

     noun
    noun
    NAmE//ˈvɪlən//
     
     
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  1. 1the main bad character in a story, play, etc. He often plays the part of the villain.
  2. 2a person who is morally bad or responsible for causing trouble or harm the heroes and villains of the 20th century Industrialized nations are the real environmental villains.
  3. 3 (informal) a criminal
See the Oxford Advanced Learner's Dictionary entry: villain