I think you might be asking if the wireless AP itself can be a wireless client, which it cannot, it's definitely an access point, not a client. If there's another Meraki AP in the same wireless network, they can auto-mesh and then you have have other wireless clients connect to your (mesh) AP which would then have a wireless mesh backhaul to the other (gateway) AP. So the AP itself doesn't require a wired Ethernet connection (although that would be preferable) as it can mesh to another AP via wireless, but it cannot act as a wireless client and then extend that connection to other wireless clients. What is it you were trying to accomplish, for what kind of connectivity?