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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This is a big departure and proof that Apple has really succeeded in leveraging its own ecosystem, with this traditional iPhone chip working across its operating systems. Matthew Buzzi, PC Magazine, 5 Mar. 2026 Please update your browser and operating system to continue to watch. Bloomberg News, Bloomberg, 5 Mar. 2026 Arxy has developed a digital go-to-market operating system that connects brands and retailers through virtual showrooms. Alexandra Harrell, Sourcing Journal, 5 Mar. 2026 Even with the iPhone chip, the machine still runs the same macOS operating system found on other Macs. Bloomberg News, Boston Herald, 4 Mar. 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

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Cite this Entry

“Operating system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/operating%20system. Accessed 6 Mar. 2026.

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)

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