How do YOU define Zionist?

I see that word used a lot and I think people define it in many ways and it causes a lot of miscommunication. Most people separate Zionists and Jewish people, I would, they are not interchangeable. Some people define Zionism as simply agreeing that Israel should exist. Some people define it as a religious right and movement for the Jews on the land of Israel. Some see it as a historical right to the land for the Jews. Some people who support the right for Israel to exist don’t identify as Zionists, because their main reason for support is the UN decision establishing Israel.

How do you define Zionism and why?