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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.

The EU on Monday laid out measures it wants Google to take to open up its operating system to rival AI services, in a move slammed by the US tech giant.

From Barron's • Apr. 27, 2026

It also unveiled an operating system called Kaka Claw, aimed at powering in-vehicle features, including voice interaction and other smart controls.

From The Wall Street Journal • Apr. 23, 2026

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

"Mythos Preview has already found thousands of high-severity vulnerabilities, including some in every major operating system and web browser," Anthropic claimed on 7 April.

From BBC • Apr. 17, 2026

‘But mine works on a different operating system from other people’s. And my wiring’s different too.’

From "The London Eye Mystery" by Siobhan Dowd