Heinous means shockingly evil or wicked, so terrible that it makes people recoil in horror and disgust. When we call something heinous, we're saying it goes beyond ordinary wrongdoing into something truly monstrous.

A heinous crime is an act so cruel and vicious that it shocks the conscience of everyone who hears about it. Kidnapping, for example, is considered a heinous crime because it violates a person's freedom and safety in such a fundamental way.

Heinous acts inspire hatred and revulsion. You might hear about a heinous villain in a story whose actions are so awful they're hard to even read about. In everyday conversation, people sometimes use it more loosely to describe things that are just really, really bad, like calling someone's fashion choice “heinous,” but the word's true power is reserved for describing genuine evil.

When something is heinous, there's no gray area, no excuse, no way to justify it. It stands as a reminder that some actions are universally recognized as wrong.