closed system

noun

Thermodynamics.

1. a region that is isolated from its surroundings by a boundary that admits no transfer of matter or energy across it.

closed system

1. A physical system that does not interact with other systems. A closed system obeys the conservation laws in its physical description.

2. Also called isolated system

3. Compare open system

Word History and Origins

Origin of closed system¹

First recorded in 1895–1900

Example Sentences

Normally, nuclear reactors use purified water, which runs through a closed system to ensure that none of the water from the reactor can get out—and that no impurities can get in.

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This would be a significant change to Apple's "closed system", where apps can only be downloaded from its own App Store.

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This would be a significant change to Apple's infamous "closed system" where apps can only be downloaded from its own App Store.

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"North Korea is a very closed system and closed economy so they created a successful industry for hacking and laundering and they don't care about the negative impression of cyber crime," Dr Dorit Dor from cyber security company Check Point said.

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Or the TCM could be in an isolated chamber, evacuated of air, which is known as a closed system.

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