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Definitions

dos

[daws, dos] / dɔs, dɒs /
NOUN
disk operating system
Synonyms




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.

Its Basic programming language and DOS operating system weren’t innovative in the market—but became standards.

From Barron's • Mar. 13, 2026

PS: if the thought of installing Windows 98 from DOS is too intimidating, you’re in luck.

From The Verge • Jul. 11, 2022

We’d still be staring at DOS prompts on monochrome screens.

From Seattle Times • Nov. 20, 2021

The 30-year-old, who is the daughter of actress Catherine Oxenberg, was recruited to NXIVM's master-slave sorority known as DOS by Mack, 38.

From Fox News • Jul. 1, 2021

The system does not support DOS or Unix wildcards.

From Big Dummy's Guide to the Internet by Electronic Frontier Foundation