Source : Webster's Revised Unabridged Dictionary (1913)

Probity \Prob"i*ty\, n. [F. probit['e], fr. L. probitas, fr.
   probus good, proper, honest. Cf. {Prove}.]
   Tried virtue or integrity; approved moral excellence;
   honesty; rectitude; uprightness. ``Probity of mind.'' --Pope.

   Syn: {Probity}, {Integrity}.

   Usage: Probity denotes unimpeachable honesty and virtue,
          shown especially by the performance of those
          obligations, called imperfect, which the laws of the
          state do not reach, and can not enforce. Integrity
          denotes a whole-hearted honesty, and especially that
          which excludes all injustice that might favor one's
          self. It has a peculiar reference to uprightness in
          mutual dealings, transfer of property, and the
          execution of trusts for others.

Source : WordNet®

probity
     n : complete and confirmed integrity