Definitions

1. noun

A unit of time equal to one billionth of a second, used to express extremely short durations.

“The laser emitted a pulse of light that lasted only a few nanoseconds.”

2. noun

A very short period of time, especially in the context of electronic or optical phenomena.

“The nanosecond delay between the two signals was imperceptible to the human eye.”

3. adjective

Extremely short in duration or period.

“The nanosecond exposure time was necessary for capturing the fleeting moment.”