When I use the word "evil" I am referring to any act which intentionally harms any person who isn't currently initiating force or violating private property; harms someone who does not deserve to be harmed at this moment*.
Philip Zimbardo, in The Lucifer Effect, defines it thusly: “Evil consists in intentionally behaving in ways that harm, abuse, demean, dehumanize, or destroy innocent others—or using one’s authority and systemic power to encourage or permit others to do so on your behalf.” So he includes those using their (imaginary) "authority" to influence others to be evil under his definition of evil. I agree.
(*An "innocent" person. No one is "innocent" all the time, nor is anyone never "innocent". All you can do is judge their innocence or guilt at this moment.)