PRESIDENT (סָרַכְ, H10518). One of the three governors appointed by the king of Persia to be rulers over the 150 satraps of the empire (Dan 6:2-7). Daniel was one of these presidents, and because of the envy of the satraps and the other presidents Daniel was put in the lions’ den.

International Standard Bible Encyclopedia (1915)

Used only in Da 6:2-7. Probably a Persian derivative from sar, "head," and the Aramaic equivalent for Hebrew shoter. The meaning is self-evident and refers to the appointment of Daniel by Darius to be one of the three princes who had rule over the satraps of the empire.