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English definition of “staple”

staple

noun [C] (WIRE)   /ˈsteɪ·pəl/
a short, thin, U-shaped piece of wire with ends that bend to fasten sheets of paper together: Put a staple in the upper left-hand corner. A staple is also a small, thick, U-shaped piece of metal with sharp ends that is hammered into a surface to hold something in place.
(Definition of staple noun (WIRE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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