Hām'mer1, n.
[A-S., D., & M. H. Ger. hamer, O. H. Ger. & Icel. hamar, N. H. Ger. & Dan. hammer, - Sw. hammare.]
Sense 1. An instrument for driving nails, beating metals, and the like, consisting of a head, usually metallic, fixed crosswise to a handle.
The armorers With busy hammers closing rivets up. Shak.
Sense 2. Something which in form or action resembles the common hammer; as, (a.) The part of a clock which strikes upon the bell to indicate the hour. (b.) That part of the arrangements of a piano which strikes the wires, to produce the tones. (c.) (Amat.) The malleus, or outermost of the four small bones of the ear. (d.) (Gun.) A piece of steel covering the pan of a flint-lock musket, which being struck by the flint, a spark was produced to ignite the priming; also, that part of a percussion-lock which strikes the cap or primer.