a region that is isolated from its surroundings by a boundary that admits no transfer of matter or energy across it.
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Compare open system.
Origin of closed system
First recorded in 1895–1900
Words nearby closed system
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Scientific definitions for 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.