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English definition of “nanosecond”

nanosecond

noun [C]     /ˈnænəʊˌsekənd/
MEASURES, IT a measurement equal to one billionth of a second, used to describe the speed at which a computer works on data: The chip's memory access time of 26 nanoseconds made it highly competitive.
in a nanosecond in an extremely short time: Following the scandal, their stocks went from 100 to zero in a nanosecond.
(Definition of nanosecond noun from the Cambridge Business English Dictionary © Cambridge University Press)
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