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English definition of “leak”

leak

verb [I or T] uk   /liːk/ us  

leak verb [I or T] (LIQUID/GAS)

B2 (of a liquid or gas) to escape from a hole or crack in a pipe or container or (of a container) to allow liquid or gas to escape: Water was leaking from the pipe. Oil leaked out of the car. The tin was leaking. The car leaked oil all over the drive.Plumbing and pipes and sewageMovement of liquids

leak verb [I or T] (INFORMATION)

C2 to allow secret information to become generally known: He leaked the names to the press. News of the pay cuts had somehow leaked out.Revealing secrets and becoming known

leak

noun [C] uk   /liːk/ us  

leak noun [C] (LIQUID/GAS)

B2 a hole or crack through which a liquid or gas can flow out of a container, or the liquid or gas that comes out: There's water on the floor - we must have a leak. If you suspect a gas leak, phone the emergency number.Movement of liquidsHoles, hollows and dips

leak noun [C] (INFORMATION)

C2 the origin of secret information which becomes known, or the act of making it known: There have been several security leaks recently. They traced the leak to a secretary in the finance department.Revealing secrets and becoming known
(Definition of leak from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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