Righteousness by Faith

What, to you, is Righteousness by Faith? Is it justification alone? Is it sanctification alone? Or, is it justification by faith and a lifelong process of becoming perfect(overcoming sin) through the elimination of one sin after another through our efforts plus the power of the Holy Spirit? Or, is it justification by faith plus sanctification by faith, imputed and imparted righteousness that comes through our abiding relationship with Jesus alone? Or, is it something other than I have listed above as I doubt I could even list all the different ways people view this subject.