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Showing results for operating system.
Definitions

operating system

[op-uh-rey-ting sis-tuhm] / ˈɒp ə reɪ tɪŋ ˌsɪs təm /
NOUN
computer software for basic operation
Synonyms
WEAK
MS-DOS MacOS OS OS/2 UNIX Windows disk operating system dos executive system software systems program

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

His customers kept telling him that what they actually wanted was the software, and what saved Apple in the end was not the machine but the operating system inside it.

From MarketWatch • Apr. 22, 2026

The development of the Claude Mythos model by Anthropic has led to crisis meetings, after it found vulnerabilities in every major operating system and browser.

From BBC • Apr. 16, 2026

A software bug that was capable of crashing an operating system used by firewalls, servers and network appliances went undetected for over 27 years.

From The Wall Street Journal • Apr. 14, 2026

Then, on its own — without human guidance or help — figured out how to use that flaw to take control of any server running the operating system, using any computer, anywhere in the world.

From Los Angeles Times • Apr. 10, 2026

He yelled a question to Eric about the new operating system.

From "Geeks: How Two Lost Boys Rode the Internet Out of Idaho" by Jon Katz