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Hammer (n.) An instrument for driving nails, beating metals, and the like, consisting of a head, usually of steel or iron, fixed crosswise to a handle.
Hammer (n.) Something which in firm or action resembles the common hammer
Hammer (n.) That part of a clock which strikes upon the bell to indicate the hour.
Hammer (n.) The padded mallet of a piano, which strikes the wires, to produce the tones.
Hammer (n.) The malleus.
Hammer (n.) That part of a gunlock which strikes the percussion cap, or firing pin; the cock; formerly, however, a piece of steel covering the pan of a flintlock musket and struck by the flint of the cock to ignite the priming.
Hammer (n.) Also, a person of thing that smites or shatters; as, St. Augustine was the hammer of heresies.
Hammer (v. t.) To beat with a hammer; to beat with heavy blows; as, to hammer iron.
Hammer (v. t.) To form or forge with a hammer; to shape by beating.
Hammer (v. t.) To form in the mind; to shape by hard intellectual labor; -- usually with out.
Hammer (v. i.) To be busy forming anything; to labor hard as if shaping something with a hammer.
Hammer (v. i.) To strike repeated blows, literally or figuratively.