The 3rd definition provided by Dictionary.com seems to fit the closest to my interpretation of what forgiveness is all about. True forgiveness is much more than a simple pardon. Forgiveness is more important for the giver than the givee, if you asked me.
forgiveness n 1: compassionate feelings that support a willingness to forgive.
The 2nd definition at Dictionary.com has ties closer to the religious definition of forgiveness, along the lines of "forgive them, they know not what they do".