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English definition of “hammer”

hammer

noun [C]  /ˈhæm·ər/ us  
a tool with a heavy metal top attached to a straight handle, used for hitting an object such as a nail into a substance that holds it firmly in place

hammer

verb [I/T]  /ˈhæm·ər/ us  
to hit something repeatedly with, or as if with, a hammer: [T] I hammered the nail into the wall. To hammer is also to repeat again and again esp. to persuade other people about something: [I always + adv/prep] Martin Luther King, Jr., hammered at the theme that the civil rights movement must avoid violence. [I always + adv/prep] His attorneys hammered away at the idea that the police department was incompetent.
Phrasal verbs
(Definition of hammer from the Cambridge Academic Content Dictionary © Cambridge University Press)
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