hard wipe / soft wipe

MrVic: Full wipe accounts reset to zero, and start over (release we will see this)
Soft wipe varies sometimes. Typically its a refund of the full value of all the current tanks/modules/ammo in your garage and all your gained experience converted to free experience.
So you start new with a pile of cash and a ton of exp to reinvest. We "might" see a soft wipe at clan wars release but that is not known for sure at this time.