Home › Words › S › stopcockstopcock/ˈstɑpkɑk/stopcock means A valve, tap or faucet which regulates the flow of liquid or gas through a pipe.Among words judged in Lexicurio's Arena, stopcock ranks #1,006 of 42,762 for Qualifying.stopcock is pronounced /ˈstɑpkɑk/.EtymologyFrom stop + cock.nounA valve, tap or faucet which regulates the flow of liquid or gas through a pipe.A main shutoff for water to a home from a municipal supply. Usually these valves exist in pairs, one outside the property boundary and one inside the property boundary.e.g.“If you have a burst pipe, turn the water off at the stopcock.”verbTo control the gas pressure in (an oil well) by keeping the well closed in and the gas confined except during set intervals when the oil is flowed or pumped.Definitions & examples from Wiktionary (CC BY-SA 3.0).