To extinguish or put out, as fire.To extinguish or allay; stop; put an end to, as thirst.To relieve the thirst of.To suppress; stifle; check; repress; destroy: as, to quench a passion or emotion.To lay or place in water, as a heated iron. See temper.To be extinguished; go out.To lose zeal; cool; become cool.n. The act of quenching or extinguishing; also, the state of being extinguished.To produce a series of crusts on (molten metal), each being taken off as soon as it is formed.n. A pit or cavity in which water can be thrown upon hot coke just manufactured in an oven, so as to cool it and leach out the soluble sulphur elements.