Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An assembly or meeting with all members present.
  • n. A condition, space, or enclosure in which air or other gas is at a pressure greater than that of the outside atmosphere.
  • n. The condition of being full; fullness.
  • n. A space completely filled with matter.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A space that is completely filled with matter.
  • n. A state of fullness, a great quantity (of something).
  • n. A legislative meeting (especially of the Communist Party) in which all members are present.
  • n. An enclosed space having greater than atmospheric pressure.
  • n. The space above a false ceiling used for cables, ducts etc.
  • n. A type of network cabling which satisfies plenum-ratings issued by the National Electrical Code. These cables are safer in case of a fire, producing less smoke and fumes.

from the GNU version of the Collaborative International Dictionary of English

  • n. That state in which every part of space is supposed to be full of matter; -- opposed to vacuum.
  • n. A condition, as in an occupied room, in which the pressure of the air is greater than that of the outside atmosphere.

from The Century Dictionary and Cyclopedia

  • n. The fullness of matter in space: the opposite of vacuum: also used to denote fullness in general.
  • n. A quantity of a gaseous body in an inclosed space greater than would remain there under normal atmospheric pressure.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an enclosed space in which the air pressure is higher than outside
  • n. a meeting of a legislative body at which all members are present

Etymologies

Latin plēnum (spatium), full (space), neuter of plēnus.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin plēnum, noun use of neuter of plēnus ("full"). Influenced by Russian пленум (plénum, "plenary session"), from the same Latin source. (Wiktionary)

Examples

  • But it is more usual to employ what is called the plenum process, in which air under high pressure is pumped into the caisson and expels the water, as in a diving bell.

    Scientific American Supplement, No. 417, December 29, 1883

  • The air runs through a massive bank of modular filters to remove dust and other contaminants before it circulates in a massive cavity, called a plenum, below its data center halls.

    Latest from Computerworld

  • The flow typically proceeds from the throttle body into a chamber called the plenum, which in turn feeds individual tubes, called runners, leading to each intake port.

    Automotive News Blog at CARandDRIVER.com - Car News Resource

  • A motorized rolling screen integrated in a plenum is the ultimate solution to transform a living room in a stunning Home Theater.

    HiddenWires News

  • Here is life -- yours and mine -- a kind of plenum in vacuo.

    The Return

  • Space, in Descartes 'view, is a' 'plenum' 'occupied by an ether, which, imperceptible to the senses, is capable of transmitting forces on material bodies immersed in it.

    Citizendium, the Citizens' Compendium - Recent changes [en]

  • '' plenum '' occupied by an ether, which, imperceptible to the senses, is capable of transmitting forces on material bodies immersed in it.

    Citizendium, the Citizens' Compendium - Recent changes [en]

  • Second, the plenum gave more latitude to Chinese peasants to break free from the system of collective farms and to cultivate crops on individual plots through “side-occupations,” such as growing fruit and vegetables and raising livestock.7 Finally, the plenum made a nod in the direction of the need for a more independent judicial system to arbitrate the kind of disputes that would arise in a “new world of local commercial initiatives.”

    Zero-Sum Future

  • Crucially, the plenum recommended that authority should be “shifted from the leadership to the lower levels.”

    Zero-Sum Future

  • The plenum officially adopted the policy of “socialist modernization.”

    Zero-Sum Future

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Comments

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  • Their memories clog me like arterial fur. I'm full, I said to Harley. I have achieved a fucking plenum. From "The Last Werewolf" by Glen Duncan.

    March 1, 2012

  • See citation on bombinate.

    March 29, 2008