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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.

Palantir has become the operating system for the Defense Department.

From The Wall Street Journal • May 9, 2026

“Mythos could find and exploit vulnerabilities in every major operating system and web browser—even when used by non-experts,” it said, foreshadowing how AI-driven cyber risks could destabilize the financial system if not managed carefully.

From The Wall Street Journal • May 8, 2026

Roku makes streaming devices and licenses its operating system to TV makers.

From Barron's • May 1, 2026

Google and iPhone-maker Apple are among operating system developers offering them as an alternative way users can sign into accounts.

From BBC • Apr. 24, 2026

I’d begun writing for a new website, Slashdot.org, an intensely geeky techno/pop-culture site devoted to the open source Linux operating system and to the open source and free software movements.

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