definitions

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.

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Nearby words

closed shell, closed shop, closed source, closed stance, closed surgery, closed system, closed traverse, closed union, closed universe, closed-angle glaucoma, closed-captioned
Compare open system.

Origin of closed system

First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for closed system

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.