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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
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 Even top-of-the-line phones are destined to become obsolete—still able to perform the basic functions like phone calls and texts, but stuck with an old operating system and failing apps. Andrew Moseman, The Atlantic, 21 Oct. 2025 The dongle receives information from the mouse and relays it to the computer’s operating system through Bluetooth or a radio frequency. Bestreviews, Mercury News, 20 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 30 Oct. 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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