operating system
nounUK /ˈɒpəreɪtɪŋ ˈsɪstəm/
US /ˈɑːpəreɪtɪŋ ˈsɪstəm/
The main program that helps a computer run and lets you use other programs.
Windows and macOS are common operating systems.
OTHER MEANINGS
2. The software layer that manages hardware and provides services to applications.
The operating system allocates memory to each running app.
3. A set of procedures for running an organization or machine.
The factory follows a strict operating system for safety checks.
4. The foundational environment in which a system operates.
The company's operating system is built on clear communication.