  Let G/K be an irreducible Hermitian symmetric space and let D be a
K-invariant domain in G/K. In this paper we characterize several classes of
K-invariant plurisubharmonic functions on D in terms of their restrictions to a
slice intersecting all K-orbits. As applications we show that K-invariant
plurisubharmonic functions on D are necessarily continuous and we reproduce the
classification of Stein K-invariant domains in G/K obtained by E. Bedford and
J. Dadok.
