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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012