Found 2 items, similar to jackhammer.
English → English (WordNet) Definition: jackhammer jackhammer n : a hammer driven by compressed air [syn: air hammer, pneumatic hammer ]
English → English (gcide) Definition: jackhammer 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]