noun
A portable percussive power tool that combines a hammer and chisel used to drill or break hard matter, for instance rock or concrete.
(figurative) Something that is very strong but also very rigid.
verb
(intransitive) To use a jackhammer.
(transitive) To break (something) using a jackhammer.
(transitive) To form (something) using a jackhammer.
(intransitive, figurative) To move like a jackhammer.
(transitive, figurative) To move (something) like a jackhammer.
(transitive, figurative) To strike (something) repeatedly with force, to pound.