- an automatic valve for a steam boiler, pressure cooker, etc., which opens if the pressure becomes excessive
- any outlet for the release of strong emotion, energy, etc.
safety valvesafety valve
- A valve in a pressure container, as in a steam boiler, that automatically opens when pressure reaches a dangerous level.
- An outlet for the release of repressed energy or emotion.
(plural safety valves)
- A relief valve set to open at a pressure below that at which a container (such as a boiler) would burst
- attributive form of safety valve, noun.
- The signal being given to let go, the machine darted forward at a terrific pace, and the safety-valve ceased to blow.
- Mainly agricultural, and in parts purely feudal, was changed into one of vast industries and of great concentrations of population; and for the ferment created by this change there was no such safety-valve in the representative system as had existed in England since the Reform Bill.
- Meanwhile the reactionaries of Vienna were goading the Magyar Liberals into revolt, and Arany found a safety-valve for his growing indignation by composing a satirical poem in hexameters, entitled "The Lost Constitution."