jackhammer

[ jak-ham-er ]
/ ˈdʒækˌhæm ər /

noun

a portable drill operated by compressed air and used to drill rock, break up pavement, etc.

Origin of jackhammer

An Americanism dating back to 1925–30; jack1 + hammer

Example sentences from the Web for jackhammer

British Dictionary definitions for jackhammer

jackhammer
/ (ˈdʒækˌhæmə) /

noun

a hand-held hammer drill, driven by compressed air, for drilling rocks, etc