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[puhmp-ak-shuh n] /ˈpʌmpˌæk ʃən/

(of a shotgun or rifle) having an action that extracts the empty case, loads, and cocks the piece by means of a hand-operated lever that slides backward and forward; slide-action.
(of a shotgun or other repeating firearm) operated by a slide-action mechanism feeding ammunition from a magazine under the barrel into the breech
spraying or dispensing liquid by means of a pump rather than using a propellant

pertaining to something that has a repeating action, as a gun or a spray dispenser


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