World English Dictionary
hammer (ˈhæmə)
1.  a hand tool consisting of a heavy usually steel head held transversely on the end of a handle, used for driving in nails, beating metal, etc
2.  any tool or device with a similar function, such as the moving part of a door knocker, the striking head on a bell, etc
3.  a power-driven striking tool, esp one used in forging. A pneumatic hammer delivers a repeated blow from a pneumatic ram, a drop hammer uses the energy of a falling weight
4.  a part of a gunlock that rotates about a fulcrum to strike the primer or percussion cap, either directly or via a firing pin
5.  athletics
 a.  a heavy metal ball attached to a flexible wire: thrown in competitions
 b.  the event or sport of throwing the hammer
6.  an auctioneer's gavel
7.  a device on a piano that is made to strike a string or group of strings causing them to vibrate
8.  anatomy the nontechnical name for malleus
9.  curling the last stone thrown in an end
10.  go under the hammer, come under the hammer to be offered for sale by an auctioneer
11.  hammer and tongs with great effort or energy: fighting hammer and tongs
12.  slang (Austral), (NZ) on someone's hammer
 a.  persistently demanding and critical of someone
 b.  in hot pursuit of someone
vb (often foll by away)
13.  to strike or beat (a nail, wood, etc) with or as if with a hammer
14.  (tr) to shape or fashion with or as if with a hammer
15.  (tr; foll by in or into) to impress or force (facts, ideas, etc) into (someone) through constant repetition
16.  (intr) to feel or sound like hammering: his pulse was hammering
17.  to work at constantly
18.  (Brit) (tr)
 a.  to question in a relentless manner
 b.  to criticize severely
19.  informal to inflict a defeat on
20.  slang (tr) to beat, punish, or chastise
21.  (tr) stock exchange
 a.  to announce the default of (a member)
 b.  to cause prices of (securities, the market, etc) to fall by bearish selling
[Old English hamor; related to Old Norse hamarr crag, Old High German hamar hammer, Old Slavonic kamy stone]

Collins English Dictionary - Complete & Unabridged 10th Edition
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