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closed system

noun, Thermodynamics
a region that is isolated from its surroundings by a boundary that admits no transfer of matter or energy across it.
Compare open system.
Origin of closed system
1895-1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for closed system
  • It also retains the total factor cost, which is equal to the total factor income in a closed system.
  • Cable will still be a closed system and neither company will have access to track that content.
  • And if it were developed this way, it would have to be a tightly-controlled closed system.
  • No human organ system is a closed system, including the central nervous system.
  • closed system does not require, or imply verticality.
  • Prevent deposition of dust: closed system, dust-explosion proof electrical equipment and lighting.
Contemporary definitions for closed system

a complete and seemingly unchangeable set of doctrines, ideas, or things; a self-contained system that is unaffected by outside influences's 21st Century Lexicon
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closed system in Science
closed system  
A physical system that does not interact with other systems. A closed system obeys the conservation laws in its physical description. Also called isolated system. Compare open system.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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