Which term is used to describe a word or words that are supposed mean the opposite of literal meaning?

The term used to describe words or phrases that mean the opposite of their literal meaning is irony.

There are different types of irony:

* Verbal irony: Saying something that is the opposite of what you mean.

* Situational irony: When an event occurs that is the opposite of what you would expect.

* Dramatic irony: When the audience knows something that the characters in a story do not.

Let me know if you'd like more details on any of these types!