clean room

American  

noun

• clean rooms
  plural

1. a room in which contaminants such as dust are reduced to a very low level by special procedures so that operations such as the manufacture and assembly of delicate equipment or the manipulation of biological materials can be performed effectively.

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clean room Scientific  

/ klēn /

1. A room that is maintained free of contaminants, such as dust or bacteria. Clean rooms are used in laboratory work and in the production of precision parts for electronic or aerospace equipment.

2. Also called white room

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Other Word Forms

Noun Inflected Forms

• clean rooms
  plural

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Etymology

Origin of clean room

An Americanism dating back to 1960–65

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Example Sentences

See Examples For:

clean room

The Leica factory is half high-tech clean room, half old-world workshop.

From The Wall Street Journal ● Sep. 27, 2026

A quarter-century later, that fantasy is turning into reality inside a 40-foot-tall clean room at the Johns Hopkins University Applied Physics Laboratory just outside the Washington, D.C.,

From Los Angeles Times ● Aug. 22, 2026

Micron is expected to bring two chip factories online in Idaho by the end of 2028, each with around 600,000 square feet of clean room capacity.

From Barron's ● Mar. 16, 2026

Chip fabs take at least two years to come online, Weathers noted, and existing sites are limited from adding more clean room space, which is where chips are manufactured.

From MarketWatch ● Feb. 14, 2026

There was no sugarcoating the fact that Dad’s skills in the kitchen were the equivalent of mine at keeping a clean room.

From "Sir Fig Newton and the Science of Persistence" by Sonja Thomas

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