mi·​cro·​sec·​ond | \ ˈmī-krō-ˌse-kənd How to pronounce microsecond (audio) , -kənt \

Definition of microsecond

: one millionth of a second

Examples of microsecond in a Sentence

Recent Examples on the Web The performance core also integrates a new microcontroller that can examine the needs of applications in a microsecond, even faster than a millisecond. Mark Hachman, PCWorld, 19 Aug. 2021 The question of leap seconds is contentious, because some scientists believe simply adjusting each day’s microsecond difference is better. Caroline Delbert, Popular Mechanics, 11 Jan. 2021 Within a fraction of a microsecond, the electron and the positron collide and annihilate each other in a flash of gamma rays. Adrian Cho, Science | AAAS, 25 Aug. 2020 In the next microsecond, the cop, his eyes burning with fear, pulled and pointed his M9 Berretta two inches from my forehead. Tom Stienstra, San Francisco Chronicle, 30 June 2020 The next step in the build required Keegan to look down for just a microsecond. August Cole, Wired, 5 June 2020 But under the extreme high-energy conditions of the early Universe in its first microseconds of existence, that couldn't happen. Jennifer Ouellette, Ars Technica, 1 May 2020 With careful engineering and problem solving, the company has increased clock accuracy from within 10 milliseconds to within 100 microseconds. Caroline Delbert, Popular Mechanics, 18 Mar. 2020 And that's a problem, because the typical lifetime of a qubit stored in this memory is 70 microseconds, much shorter than the entanglement process. John Timmer, Ars Technica, 12 Feb. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'microsecond.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of microsecond

1906, in the meaning defined above

History and Etymology for microsecond

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Time Traveler for microsecond

Time Traveler

The first known use of microsecond was in 1906

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Cite this Entry

“Microsecond.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microsecond. Accessed 6 Dec. 2021.

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More Definitions for microsecond



English Language Learners Definition of microsecond

: one millionth of a second
: a very short period of time


mi·​cro·​sec·​ond | \ ˈmī-krō-ˌsek-ənd, -ənt How to pronounce microsecond (audio) \

Medical Definition of microsecond

: one millionth of a second

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Thesaurus: All synonyms and antonyms for microsecond


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