What does AAAA games mean?

Excuse me, could you please clarify what exactly "AAAA games" refers to in the context of gaming and the entertainment industry? I've heard this term being used lately, but I'm not entirely sure of its specific meaning or significance. Is it a classification for a particular level of graphical fidelity, gameplay mechanics, or perhaps a designation for a specific type of game? Could you provide a concise yet informative explanation of this term and its origins?