Top Definition
A billionth of a second
RAM is measured in nanoseconds.
by Shellie April 27, 2004
1 more definition
A nanosecond is the time that takes the red light to turn green and the car that is behind you to honk three times
cling!(Green light)
HONK HONK HONK!
nanosecond!
by jackts9999 May 03, 2009

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