1. Satisfy (thirst)
   "The cold water quenched his thirst";
   - slake, allay, assuage
    
2. Put out, as of fires, flames, or lights
   "quench the flames";
   - snuff out, extinguish
    
3. Cool (hot metal) by plunging into cold water or other liquid
   "quench steel"
    
4. Suppress (sparking) when the current is cut off in an inductive circuit, or suppress (an oscillation or discharge) in a component or device
   "The engineer designed a circuit to quench the unwanted oscillations"
    
5. Suppress or crush completely
   "quench a rebellion";
   - squelch [informal], quell
    
6. (physics) reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
   "They quenched the fluorescence to study the material's properties"

Derived forms: quenches, quenched, quenching

Type of: break, break off, bring down, cease, chill, conform to, conquer, cool, cool down, cut, cut back, cut down, discontinue, fill, fit, fulfil [Brit, Cdn], fulfill [N. Amer], give up, lay off, meet, quit, reduce, satisfy, stamp down, stop, subdue, suppress, surcease [archaic], trim, trim back, trim down

Encyclopedia: Quench