Try Our Apps


Supposedly vs. Supposably


[nan-uh-sek-uh nd, ney-nuh-] /ˈnæn əˌsɛk ənd, ˈneɪ nə-/
one billionth of a second.
Abbreviation: ns, nsec.
Origin of nanosecond
1955-60; nano- + second2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for nanosecond
Contemporary Examples
British Dictionary definitions for nanosecond


one thousand-millionth of a second ns
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for nanosecond

1959, from nano- + second (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
nanosecond in Science
One billionth (10-9) of a second.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
nanosecond in Culture
nanosecond [(nan-uh-sek-uhnd)]

A billionth of a second.

Note: The term is often used to refer to a very short time: “He missed having an accident by nanoseconds.”
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
nanosecond in Technology

(ns) 10^-9 seconds; one thousand millionth part of a second.
This is the unit in which the fundamental logical operations of modern digital circuits are typically measured. For example, a microprocessor with a clock frequency of 100 megahertz will have a 10 nanosecond clock period.

The Free On-line Dictionary of Computing, © Denis Howe 2010
Cite This Source

Word of the Day

Difficulty index for nanosecond

Few English speakers likely know this word

Word Value for nanosecond

Scrabble Words With Friends

Nearby words for nanosecond