adjective
[ only before noun ] ( of a gun or other device ) worked by quickly pulling or pressing part of it in and out or up and down :
a pump-action shotgun
a pump-action spray
adjective
[ only before noun ] ( of a gun or other device ) worked by quickly pulling or pressing part of it in and out or up and down :
a pump-action shotgun
a pump-action spray
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005