What is the meaning of "do away with"?

The meaning of "do away with" is:

remove, kill

What is the definition of "do away with"?

The definition of "do away with" is:

remove, kill

"do away with" means

remove, kill

Example Sentences:

All societies should do away with the death penalty. It’s cruel and unfair.

I decided to do away with some of my old clothes, because they no longer fit. Do you want some of them?

Many people think our school should do away with many of the rules we have.

The USA did away with Saddam Hussein.