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English definition of “pump-action”

pump-action

adjective [before noun] uk   /ˈpʌmp.æk.ʃən/ us  
refers to a device that operates by forcing something, especially air, in or out of a closed space or container: a pump-action shotgun a pump-action toiletGenerating and pumping devices
(Definition of pump-action from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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