jackhammer

noun jack·ham·mer \ ˈjak-ˌha-mər \
|Updated on: 25 Jul 2018

Definition of jackhammer

1 : a pneumatically operated percussive rock-drilling tool usually held in the hands
2 : a device in which a tool (such as a chisel for breaking up pavements) is driven percussively by compressed air

jackhammer

verb

Recent Examples of jackhammer from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'jackhammer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of jackhammer

1916

in the meaning defined at sense 1

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JACKHAMMER Defined for English Language Learners

jackhammer

Definition of jackhammer for English Language Learners

  • : a heavy tool used to break hard substances (such as concrete) into pieces by a repeated pounding action



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