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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
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.
Turn on automatic updates for both the operating system and apps, especially banking and payment apps. Kurt Knutsson, FOXNews.com, 25 Nov. 2025 Scarcity is the emotional operating system of the modern economy. Chris Schembra, Rolling Stone, 24 Nov. 2025 Furthermore, OpenMind has developed OM1, a hardware-agnostic operating system for humanoid robots. Bojan Stojkovski, Interesting Engineering, 22 Nov. 2025 Privacy and Security The mobile operating systems have decent records and safeguards regarding security, but Android, being more open, has more vectors for malware to enter your phone. PC Magazine, 21 Nov. 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 29 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)

More from Merriam-Webster on operating system

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