plenum

/หˆpliหnษ™m/

IPA: /P L EH1 N AH0 M/

noun
  1. 1

    A space that is completely filled with matter.

  2. 2

    A state of fullness, a great quantity (of something).

  3. 3

    A legislative meeting (especially of the Communist Party) in which all members are present.

  4. 4

    An enclosed space having greater than atmospheric pressure.

  5. 5

    The space above a false ceiling used for cables, ducts etc.

  6. 6

    A type of network cabling which satisfies plenum-ratings issued by the National Electrical Code. These cables produce less smoke and fumes in the event of fire.

Antonyms

Source: https://en.wiktionary.org/wiki/plenum