"Now, that homework assignment was just pure evil."
"This sandwich tastes like evil."
The term evil is tossed around lightly nowadays. People seem to have lost the meaning of it as time passed and more laws were put into place and enforced adequately.
However, there is no 'one definition' for the word evil. There are evil acts and there are evil people. As Dr. Joshua Baron discussed: "To perform an evil act is to perform an act that causes harm to others.To be an evil person is to perform these acts as a result of extreme apathy toward others’ humanity."
So, who can be classified as truly evil within the Hunger Games trilogy? The obvious answer is President Snow. He hates the humanity of his citizens, mainly because that would give them the power to rise up and overthrow the already fragile system he has in place. (Quote the movie: "They're holding hands. I want them dead.")
(And this guy is supposed to be the tiny master of evil)