  Low frequency dielectric spectroscopy and thermally stimulated discharge
measurements of charge density wave (CDW) system K$_{0.3}$MoO$_{3}$ are
presented. Below 80 K two distinct relaxational processes are observed, which
freeze at finite temperatures bearing close resemblance to the phenomenology of
the dielectric response of glasses. We compare our results to the case of
o-TaS$_{3}$ in which the glass transition on the level of CDW superstructure
has been recently reported\cite{Star02} and discuss the possibility that it is
a universal feature of CDW systems.
