A full beard consists of hair on the chin, the cheeks, and the sideburns, without any natural or shaven gap.

In real life a full beard also includes a [[mustache]], but that's not true for a lot of bearded anime characters. 

If the character has a mustache, you can tag it as: 

* [[mustache stubble]]
* [[thick mustache]]
* [[long mustache]]

A full beard can also be a [[thick beard]], or thin [[beard stubble]].
Visual comparison post #6608064