See Also: plenum(dictionary)
PLENUM DOMINIUM(law)

plenum (iou)



plenum noun & adjective. L17.
[Latin, neut. of plenus full (sc. spatium space): cf. VACUUM. In sense 2 later infl. by Russian plenum plenary session.]
A. noun.
Physics. A space completely filled with matter; spec. the whole of space regarded as being so filled. Opp. VACUUM noun 3a. L17.
b. transf. A condition of fullness; a full place. L18.
A full assembly; a meeting of a legislative body, conference, association, etc., at which all the members are expected to be present; spec. a meeting of all the members of a Communist Party committee. L18.
Daily Telegraph Elected by secret vote at plenums of the..party committees.
(The air in) a plenum chamber in a ventilation system etc. M20.
b. attrib. or as adjective. Pertaining to or designating an artificial ventilation system in which fresh air is forced into a building and drives out the stale air. E20.
plenum chamber, plenum space an enclosed space in which air pressure is maintained above that of the atmosphere, as in a building's ventilation system, in an air-cooled engine, etc.