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.
For now, Apple and Google remain on top with the iOS and the Android mobile operating systems, respectively. Jonathan Vanian, CNBC, 16 Sep. 2025 Apple's macOS Tahoe is by far the most stunning and convenience-rich upgrade to the company's desktop operating system in the last decade. Edward Mendelson, PC Magazine, 15 Sep. 2025 Note that these settings can vary depending on device, operating system and app version, and can change. Annie Margaret, CNN Money, 13 Sep. 2025 Instead of Pascal or assembly language, Swyft's ROM operating system was primarily written in Forth. Cameron Kaiser, ArsTechnica, 12 Sep. 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

Browse Nearby Words

Cite this Entry

“Operating system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/operating%20system. Accessed 17 Sep. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!