What is Resolve?

In PvP matches there is a special “Resolve” meter. It seems to fill up during fights and then it slowly goes down. How exactly does it work? What does it affect?

Resolve is a system to counter crowd control (CC) abilities in PvP. This meter builds up as more CC is put upon you, when it reaches a certain point this allows the player to be Resolved in his motives and he becomes immune to CC for 8 seconds. This meter is viewable by anyone. So you have to be careful to see that your opponent doesn't have a near full or full resolve meter.

This allows for heavy CC builds to be used in their full extent in PvP.

When it is full, you can become immune to CC (crowd control) - stuns etc. It is filled by being subject to CC. The idea is to prevent people from spending too much time CC'd, however in practice you're not likely to see it fill without you or your opponent being dead.