a : something similar to a rock in firmness: (1) : Basis, assist The superintendent describes [Michael] Doran as being a rock on which the results of The college is and can keep on to get constructed.—???? ? ???? ?????? ??????? ?? ???? ???? ? ?? ???????? ?????? ??????? ?? ??? ? ?? ?????? ??? ????? ??? ???????? ?? ??????? ????? ??? ? ????? ??? ???