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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Microsoft unveiled a new category of PC that features generative artificial intelligence tools built into Windows, the company's world-leading operating system. Lim Hui Jie, CNBC, 5 Nov. 2025 Turn on automatic updates for your operating system, antivirus and apps. Kurt Knutsson, FOXNews.com, 30 Oct. 2025 Think of it as the operating system for your AI workforce. Swami Chandrasekaran, Fortune, 24 Oct. 2025 Our Mac testing protocols aren't exact copies of our Windows testing protocols due to the differences in operating system, chip architecture, and software catalog. PC Magazine, 21 Oct. 2025 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 7 Nov. 2025.

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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