\Su`per*er`o*ga"tion\, n. [L. supererogatio a
payment in addition.]
The act of supererogating; performance of more than duty or
necessity requires.
{Works of supererogation} (R. C. Ch.), those good deeds
   believed to have been performed by saints, or capable of
   being performed by men, over and above what is required
   for their own salvation.