clean room Hear it!

clean room definition

☆ clean room

any of various environments, as a room, designed to produce and maintain an atmosphere almost 100% free of contaminants such as dust, pollen, or bacteria: used in the assembly of spacecraft, in hospitals, etc.

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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