closed system
nounUK /kləʊzd ˈsɪstəm/
US /kloʊzd ˈsɪstəm/
A closed system is a group of things that nothing can go into or come out of.
The jar with the lid on tight is a closed system, so no air can get in or out.
RELATED WORDS
OTHER MEANINGS
2. In science, a system that can exchange energy but not matter with its surroundings.
A sealed thermos is a closed system because heat can pass through but the soup stays inside.
3. A group or organization that does not let in new ideas or people from outside.
The club was a closed system, and new members were rarely allowed to join.
4. In computing, a system that only works with its own hardware and software.
That old game console was a closed system, so you could not play games made by other companies.