What do people mean by ‘Open Zone’?

Hey all, just started playing the game and so far it has been fun. I’ve heard that the game isn’t open world in the same way that Skyrim, Oblivion, and Morrowind is, where you get one big open world map with no loading screen.

But instead that it is a ‘open zone’ game. What exactly does that mean? Does that mean its a big open world map that has been segmented into different zones via loading screens, and players can go anywhere as and when they like? Bascially Skyrim’s map but if each region was cut up by loading screens kind of like Outerworlds but bigger.

Or is it like Divinity Original Sin, where its multiple open world sandbox maps that are divided by chapters/acts?