enclosed system
nounUK /ɪnˈkləʊzd ˈsɪstəm/
US /ɪnˈkloʊzd ˈsɪstəm/
A thing that keeps everything inside it and lets nothing in or out.
A sealed jar is an enclosed system because no air can get in or out.
OTHER MEANINGS
2. In science, a system that does not exchange matter with its surroundings.
The water in the closed bottle stayed the same because it was an enclosed system.
3. A group or place that is cut off from outside contact.
The island village was an enclosed system with its own rules and trade.
4. In engineering, a machine setup where fluid or energy stays inside a loop.
The car's cooling setup is an enclosed system that reuses the same liquid.