Force-close all Terminal windows?

How can I force-close all Terminal windows without a dialog popping up which asks me if I really want to do it?

I’ve done the following, but I always get the dialog for each open Terminal window:

tell application "Terminal"
	close every window
end tell

Is there an option to Terminal’s close command to tell it to close the windows without prompting the user?

Thanks in advance.

PS: By the way, I don’t want to use “killall”. This is because I don’t want the Terminal application to end. I just want to close all of its open windows.