Pronunciation: (rad"u-man'thus),[key] —n. 1. Class. Myth.a son of Zeus and Europa, rewarded for the justice he exemplified on earth by being made, after his death, a judge in the Underworld, where he served with his brothers Minos and Aeacus.
2. an inflexibly just or severe judge. Also,Rhad"a•man'thus.