operating system

noun

Definition of operating system

  1. :  software that controls the operation of a computer and directs the processing of programs (as by assigning storage space in memory and controlling input and output functions)

First Known Use of operating system

1961


OPERATING SYSTEM Defined for English Language Learners

operating system

noun

Definition of operating system for English Language Learners

  • computers : the main program in a computer that controls the way the computer works and makes it possible for other programs to function


OPERATING SYSTEM Defined for Kids

operating system

noun

Definition of operating system for Students

  1. :  a program or series of programs that controls the operation of a computer and directs the processing of the user's programs



Seen and Heard

What made you want to look up operating system? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

sad or melancholy

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
  • Which is a synonym of garner?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!