0 a valve eg on a pressure cooker that opens if the pressure of the steam in it becomes too great. -- injap keselamatan
That provides estate agents with the necessary safety valve.
It has acted as a safety valve and as a conciliator.
A democracy, by its very nature, needs the safety valve of humour and offence in order to operate properly.
Since the 1960s and increased international aid the population has grown and, despite the safety valve of emigration, outgrown the natural resources hastening degradation of the agricultural base.
Another form of safety valve is substitution.
Perhaps one could view the shortness of life spans as such a safety valve, since no matter how horrible the suffering one incurs, it does come to a foreseeable end.
But therein exactly lies the safety valve.
However, life's finiteness is an insufficiently compassionate safety valve.