1.satisfy (thirst);
The cold water quenched his thirst
2.put out, as of fires, flames, or lights;
Too big to be extinguished at once, the forest fires at best could be contained
3.electronics: suppress (sparking) when the current is cut off in an inductive circuit, or suppress (an oscillation or discharge) in a component or device
4.suppress or crush completely;
squelch any sign of dissent
5.reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
6.cool by plunging into cold water;
quench metal