nanosecond

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noun

An SI unit of time equal to 10⁻⁹ seconds. Symbol: ns

“I just know that the nanosecond I take my eyes off my phone, somebody's going to steal it.”

UncommonScrabble 13

Meanings

nounnanosecond (plural nanoseconds)

plural nanoseconds

  1. metrologyAn SI unit of time equal to 10⁻⁹ seconds. Symbol: ns

    Meronyms: quectosecond < rontosecond < yoctosecond < zeptosecond < attosecond < femtosecond < picosecond

    3 more examples

    Holonyms: microsecond < millisecond < centisecond < decisecond < second < decasecond < minute < hectosecond < kilosecond < hour < day < week < megasecond < fortnight < month < year < gigasecond < century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond

    Since the tiny magnetic domains have to travel only submolecular distances, it is possible to read and write magnetic regions with different polarization as quickly as a single nanosecond — far faster than existing storage technologies.

    2007 September 11, John Markoff, “Redefining the Architecture of Memory”, in The New York Times, archived from the original on 09 Nov 2020

    “We were heavily involved in also trading: people on Wall Street were buying our stuff to save a few nanoseconds on the wire, the banks were doing crazy things like pulling the fibres under the Hudson taut to make them a little big shorter, to save a few nanoseconds between their datacentre and the stock exchange,” he said.

    2023 March 26, Alex Hern, quoting Michael Kagan, “Cryptocurrencies add nothing useful to society, says chip-maker Nvidia”, in The Guardian, →ISSN, archived from the original on 28 Apr 2023
  2. figurativelyAn extremely short period of time; an instant.

    I just know that the nanosecond I take my eyes off my phone, somebody's going to steal it.

Origin

  1. Ancient Greekνᾶνος (nânos)
  2. Latinnānus
  3. Englishnano-
  4. Old Frenchseconde
  5. Middle Englishsecunde
  6. Englishsecond
  7. Englishnanosecond

From nano- + second.

Full word history & related roots →

Translations

Catalan nanosegon
  • nanosegonmeasure of time
Chinese Mandarin 納秒 /纳秒
  • 納秒 /纳秒 (nàmiǎo)measure of time
Czech nanosekunda
  • nanosekundameasure of time
Danish nanosekund
  • nanosekundmeasure of time
Dutch nanoseconde
  • nanosecondemeasure of time
Estonian nanosekund
  • nanosekundmeasure of time
Finnish nanosekunti
  • nanosekuntimeasure of time
French nanoseconde
  • nanosecondemeasure of time
German Nanosekunde
  • Nanosekundemeasure of time
Hungarian nanoszekundum
  • nanoszekundummeasure of time
Icelandic nanósekúnda
  • nanósekúndameasure of time
Italian nanosecondo
  • nanosecondomeasure of time
Japanese ナノ秒
  • ナノ秒 (nanobyō)measure of time
Lithuanian nanosekundė
  • nanosekundėmeasure of time
Malay nanosaat
  • nanosaatmeasure of time
Polish nanosekunda
  • nanosekundameasure of time
Portuguese nanossegundo
  • nanossegundomeasure of time
Romanian nanosecundă
  • nanosecundămeasure of time
Russian наносеку́нда
  • наносеку́нда (nanosekúnda)measure of time
Slovak nanosekunda
  • nanosekundameasure of time
Spanish nanosegundo
  • nanosegundomeasure of time
Swedish nanosekund
  • nanosekundmeasure of time
Turkish nanosaniye
  • nanosaniyemeasure of time
Cite this entry
APA

nanosecond. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/nanosecond

MLA

“nanosecond.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/nanosecond. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “nanosecond,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/nanosecond.

Source: nanosecond on Wiktionary, CC BY-SA 4.0.