Remaking means doing or making something again, often with some changes.
When we say that a movie is being remade, it means someone has taken an old story and made a new version of it. Sometimes this is because the original was very popular and they want to bring it up-to-date for modern audiences. For example, they might change the setting or characters so it's not exactly the same as before. In other cases, someone might be remaking a classic book into a movie, but making some changes to make it more exciting.
To make again.
Recreation; reconstruction
