Verb
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""quench the flames""snuff out the candles"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""quench a rebellion"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"