Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “operating system”

See all translations

operating system

noun [C] uk   us  
a set of programs that control the way a computer system works, especially how its memory is used and how different programs work together
Translations of “operating system”
in Chinese (Traditional) (電腦的)操作系統…
in Russian операционная система…
in Turkish bilgisayar yazılım sistemi…
in Chinese (Simplified) (计算机的)操作系统…
in Polish system operacyjny…
(Definition of operating system from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of operating system?
Add Cambridge dictionaries to your browser to your website

Definitions of “operating system” in other dictionaries

Word of the Day

justice

fairness in the way people are dealt with

Word of the Day

A certain je ne sais quoi: French words and phrases used in English

by Liz Walter,
January 21, 2015
It is an odd irony that the more sophisticated your use of English is, the more likely you are to use French words and phrases. Or, to be more accurate, ones you know to be French – words such as ballet, au pair, abattoir, fiancé, café, and restaurant are so entrenched in

Read More 

flower beard noun

January 19, 2015
a beard adorned with flowers And some of said beard-rockers are even turning it up a notch, painting trend on top of trend with what’s come to be known as ‘the flower beard.’

Read More