operating system

noun

: software that controls the operation of a computer and directs the processing of programs (as by assigning storage space in memory and controlling input and output functions)

Examples of operating system in a Sentence

Recent Examples on the Web
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Google will also reportedly hold a keynote to formally introduce the new brand and its intent, as well as the software platform, including the operating system. — Jon Martindale, PC Magazine, 19 Aug. 2026 Queen One is an AI infrastructure company developing a new operating system for commerce, including retailers and apparel brands. — Arthur Zaczkiewicz, Footwear News, 18 Aug. 2026 Also keep your operating system, browser and security apps updated. — Jesse Watson , Kurt Knutsson, FOXNews.com, 14 Aug. 2026 The new operating system also makes the transition back to the station less abrupt. — Dewayne Bevil, The Orlando Sentinel, 12 Aug. 2026 See All Example Sentences for operating system

Word History

First Known Use

1961, in the meaning defined above

Time Traveler
The first known use of operating system was in 1961

Rhymes for operating system

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Browse Nearby Words

operating room
operating system
operating table
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Cite this Entry

“Operating system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/operating%20system. Accessed 21 Aug. 2026.

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Kids Definition

operating system

noun
: software that controls the operation of a computer and directs the processing of the user's programs (as by controlling input and output functions)

More from Merriam-Webster on operating system

Nglish: Translation of operating system for Spanish Speakers

Britannica.com: Encyclopedia article about operating system

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