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- Dictionarypump-action/ˈpʌmpˌakʃn/
adjective
- 1. denoting a repeating firearm in which a new round is brought from the magazine into the breech by a slide action in line with the barrel: "a pump-action shotgun"
- 2. denoting an unpressurized spray dispenser for liquid that is worked by finger action rather than by internal pressure (as in an aerosol): "a preference for pump-action sprays and roll-on applicators"
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