the state or a space in which a gas, usually air, is contained at a pressure greater than atmospheric pressure.
a full assembly, as a joint legislative assembly.
a space, usually above a ceiling or below a floor, that can serve as a receiving chamber for air that has been heated or cooled to be distributed to inhabited areas.
the whole of space regarded as being filled with matter (opposed to vacuum).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use plenum in a sentence
I set the tile aside, feeling a rush of cold tickle my nose as a gust of chill whips up from the exposed underfloor plenum.
Referendum Law inches closer to basic law status after plenum vote.
Qulibet ecclesia congregetur et eligat ex se ipsa unum plenum fide et Spiritu Dei.History of the Great Reformation, Volume IV | J. H. Merle D'Aubign
Some of my brethren might be alarmed as at febrile indications; they would bleed you—even ad plenum rivum—forgive the Latin.The Lady of Lynn | Walter Besant
A thermostat is placed in the tempered-air part of the plenum room to maintain the proper temperature of the tempered air.Physics | Willis Eugene Tower
A discussion of this kind is perhaps more than any other periculosæ plenum opus aleæ; but it is too important to be neglected.The Flourishing of Romance and the Rise of Allegory | George Saintsbury
Nature is a plenum, is finished, and the Divine account with her is closed; but man is only yet a chick in the egg.
British Dictionary definitions for plenum
an enclosure containing gas at a higher pressure than the surrounding environment
a fully attended meeting or assembly, esp of a legislative body
(esp in the philosophy of the Stoics) space regarded as filled with matter: Compare vacuum (def. 1)
the condition or quality of being full
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012