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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
Upgrading to the latest operating system doesn’t have to cost a fortune.
—
Stackcommerce Team (sponsored), PCMAG, 25 Jan. 2025
Automatic updates for operating systems, browsers and applications significantly enhance your protection level.
5.
—
Ashok Manoharan, Forbes, 22 Jan. 2025
Check out our iOS 18 roundup for a full list of all the top features of Apple's latest operating system.
—
Brenda Stolyar, WIRED, 20 Jan. 2025
Watson compares that scenario to a computer running on an old operating system.
—
Justine Calma, The Verge, 18 Jan. 2025
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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 8 Feb. 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)
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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