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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

In his view, “fully controlling both the operating system and hardware” would allow OpenAI to deliver this type of product.

From MarketWatch • 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

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

This is how having a funny brain that runs on a different operating system from other people’s helped me to figure out what had happened.

From "The London Eye Mystery" by Siobhan Dowd