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Noun: vapor lock  vey-pur lók
Usage: US (elsewhere: vapour lock)
  1. A stoppage in a pipeline caused by gas bubbles (especially a stoppage that develops in hot weather in an internal-combustion engine when fuel in the gas line boils and forms bubbles that block the flow of gasoline to the carburetor)
    - vapour lock [Brit, Cdn]

Derived forms: vapor locks

Type of: block, blockage, closure, occlusion, stop, stoppage

Encyclopedia: Vapor lock