'jackhammer' definitions:
Definition of 'jackhammer'
From: WordNet
noun
A hammer driven by compressed air [syn: air hammer, jackhammer, pneumatic hammer]
Definition of 'jackhammer'
From: GCIDE
- jackhammer \jackhammer\ n. a hammer having a strong steel cutting blade, driven by compressed air in multiple rapid strokes, and used for cutting through pavement, concrete, or other hard substances.
- Syn: air hammer, pneumatic hammer. [WordNet 1.5]