An instrument for driving nails, beating metals, and the like. It consists of an iron head, fixed crosswise to a handle. Hammers are of various sizes; a large hammer used by smiths is called a sledge.

To beat with a hammer; as, to hammer iron or steel.

To form or forge with a hammer; to shape by beating.

To work in the mind; to contrive by intellectual labor; usually with out; as, to hammer out a scheme.' .

To work; to be busy; to labor in contrivance.

To be working or in agitation.