Found 2 items, similar to plenum.
English → English (WordNet) Definition: plenum plenum n 1: a meeting of a legislative body at which all members are present; “the plenum will vote on all tax increases” 2: an enclosed space in which the air pressure is higher than outside [also: plena (pl)]
English → English (gcide) Definition: Plenum Plenum \Ple"num\, n. [L., fr. plenus full.] 1. That state in which every part of space is supposed to be full of matter; -- opposed to vacuum. --G. Francis. [1913 Webster] 2. (Ventilation) A condition, as in an occupied room, in which the pressure of the air is greater than that of the outside atmosphere; as, a plenum may exist in a hall ventilated by a fan blower. [Webster 1913 Suppl.]