noun
nanosecond
noun
1
A unit of time equal to one billionth of a second.
"The processor completes an operation in a few nanoseconds."
2
An informal way of saying "an extremely short moment."
"He hesitated for a nanosecond before answering."
How to Use Nanosecond
Learner’s notesIn plain EnglishA billionth of a second, or, casually, an instant.
Word Forms
nanoseconds plural
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The processor completes an operation in a few _____.
Etymology
From nano- (a billionth) plus second.