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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
Keep software updated: Regularly update your operating system, browsers and other software to patch security vulnerabilities.
—Kurt Knutsson, Cyberguy Report, Fox News, 20 Nov. 2024
The Pi runs a bespoke operating system developed by Glen Langston at the US National Science Foundation, specifically for observing the 21-centimeter hydrogen line and processing the data from it.
—The Physics Arxiv Blog, Discover Magazine, 14 Nov. 2024
According to a Box representative, the apps work with the two most recent versions of both major operating systems (macOS Sequoia and Sonoma, Windows 11 and 10).
—PCMAG, 11 Nov. 2024
Keep all software and operating systems up to date.
—Davey Winder, Forbes, 6 Nov. 2024
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Word History
First Known Use
1961, in the meaning defined above
Dictionary Entries Near operating system
Cite this Entry
“Operating system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/operating%20system. Accessed 29 Nov. 2024.
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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