The Brehon was an arbitrator, umpire, and expounder of the law, rather than a judge in the modern acceptation.
The Rabbi HILLEL, who in the 4th century made the remarkable declaration that Israel need not expect a Messiah, because the promise of a Messiah had already been fulfilled in the days of King Hezekiah (Babli, Sanhedrin, 99a), is probably Hillel, the son of Samuel ben Nahman, a well-known expounder of the scriptures.
Webster declared that the Federal government through the Supreme Court was the ultimate expounder and interpreter of its own powers, while Calhoun championed the rights of the individual state under a written contract which reserved to each state its sovereignty.
But the 'amora soon ceased to be a mere repeater, and developed into an original expounder of scripture and tradition.
He received £50 for a translation of Legendre's Geometry; and an introduction, explaining the theory of proportion, is said by De Morgan to show that he could have gained distinction as an expounder of mathematical principles.