from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hand-held machine for drilling rock and breaking up pavement, operated by compressed air.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A portable percussive power tool that combines a hammer and chisel used to drill or break hard matter, for instance rock or concrete.
- v. To use a jackhammer.
from the GNU version of the Collaborative International Dictionary of English
- 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a hammer driven by compressed air
Sorry, no etymologies found.