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Here are all the possible meanings and translations of the word headroom. Princeton's WordNet(0.00 / 0 votes)Rate this definition: headroom, headway, clearance(noun) vertical space available to allow easy passage under something. headroom, dynamic headroom(noun) the capacity of a system to reproduce loud sounds without distortion. headroom(Noun) the vertical clearance above someone's head, as in a tunnel, doorway etc. headroom(Noun) the ability of a system to reproduce loud sounds free of distortion; dynamic headroom.
Cleanroom Related Definitions. As Built: A functioning room with no furniture, process equipment, or personnel. Normally found only on new rooms. Very easy to pass. At Rest: Fully operational room with furniture, process and support equipment in place but not operating. The most common tested condition, also easy to pass, because no particles are being generated within the room. Ceiling Grid: Type or style of prefabricated ceiling system used in a cleanroom.