Plenum
# Plenum

Plenum may refer to:

* Plenum chamber, a chamber intended to contain air, gas, or liquid at positive pressure
* Plenism, or Horror vacui (physics) the concept that "nature abhors a vacuum"
* Plenum (meeting), a meeting of a deliberative assembly in which all members are present; contrast with quorum
* Plenum space, enclosed spaces (in buildings) used for airflow
* Plenum cable, electrical wire permitted in plenum spaces per building codes
* Plenum Publishing Corporation, a publisher of scientific books and journals
* Plenum (physics), a space completely filled with matter
* Undergravel filters, in aquarium filtration, an open space under a layer of gravel or sand
* Air-mixing plenum, a place where ducts meet
