What do you mean by idiom have the final word?

The idiom "have the final word" means to be the one who makes the final decision or to be the one who has the last say in a matter. It implies that the person who has the final word has the authority to make the final decision, even if others have differing opinions.

Here are some examples of how the idiom might be used:

* "My father always has the final word on family matters." This means the father makes the final decisions in the family.

* "After a long debate, the CEO had the final word on the new project." This means the CEO made the final decision about the project.

* "We're going to have a vote, but the manager has the final word." This means that although others will have a chance to vote, the manager ultimately gets to decide the outcome.

Essentially, "having the final word" signifies being in a position of authority or control where one's decision is the decisive factor.