I heard the word "villain" numerous times in the superhero genre. But is it common to call a criminal a "villain" in real life?

Native speaker’s answer
Rebecca
Well, "villain" is not really used commonly in real life. You will hear/notice it more commonly used in movies or literature, and in cartoons like the one here. It's not an exact substitute for "criminal," as sometimes people may use "villain" to refer to a person that is hated or very mean - they may not be a "criminal" in the legal sense, just a bad or unliked person. Ex: The superhero killed all the villains and saved the world. Ex: The reality show star was known for being a villain to the others on the show.