1. The performance of work above and beyond what is required or expected: Jim spent a supererogation of over-time work for the project he was supposed to complete in a shorter period.
2. An excess or overabundance, a profusion, or a surplus: If Jeff keeps saying that supererogation so often, there are those who believe that he should have a gag placed in his mouth.

James contributed some of his supererogation to the food bank to help the poor families in town. 3. Etymology: from Latin super, "above, over" + erogare, "pay out"; from ex-, "out" + rogare, "to ask, to request".