Cambridge Dictionary of American English
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Definition
hammer
[Hide phonetics]noun [C]
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
[Hide phonetics]verb [I/T]
to hit (something) repeatedly with, or as if with, a hammer
I hammered the nail into the wall.
To hammer is also to repeat again and again esp. to persuade other people about something: Martin Luther King, Jr. hammered at the theme that the civil rights movement must avoid violence.
His attorneys hammered away at the idea that the police department was incompetent.
