Just to clarify bridging and meshing:
Bridging as described in the document is where the AP is not doing NAT, DHCP or routing between your client devices and the local network. So it is being transparent, not creating a different lan for users of the access point, but extending the existing lan to the users wirelessly.
Meshing, also kinda known as wireless bridge, is where one AP is connected to another AP, not using the wired lan, but using a wireless connection. Usually this is useful when the second AP is too far away from the first one to be connected by wire to the same lan. Meshing needs a zone director to help the APs to set up the link, encryption and find the best meshing routes possible. The APs will talk to each other using meshing, and also talk to the client devices to service the lan. When access points have two radios (2.4GHz and 5GHz), the can do the meshing on one radio, while servicing the client devices on the other. This is more efficient than doing it all on one radio.
There are also point-to-point sets (P2P sets) of two APs that only do the wireless bridging, like the Ruckus 7731 APs. You cannot connect to them wirelessly as a client, but they will create a wireless bridge for you. These wireless bridges don't need a zone director. The zone director won't even recognize them.
One more note: different APs have their own setting of which radio they can use for meshing. APs that have 5GHz radio will always use 5Ghz for meshing, while the ones without 5Ghz can only use 2.4 GHz for meshing. So a 7341 won't mesh with a 7363. There is one exception, but shhh, I won't tell...