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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.

Many analysts say Palantir isn’t as vulnerable as other software providers because it designed an operating system to integrate with a variety of AI models and can make them more useful.

From The Wall Street Journal • May 4, 2026

As cars become computers on wheels, QNX is trusted by the world’s largest automakers because its simple, real-time operating system is designed to never, ever fail.

From The Wall Street Journal • May 2, 2026

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

Or maybe your brain works on a different operating system from other people’s like mine and you’ve worked it out too.

From "The London Eye Mystery" by Siobhan Dowd