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Definition of Plenum
1. Noun. A meeting of a legislative body at which all members are present. "The plenum will vote on all tax increases"
2. Noun. An enclosed space in which the air pressure is higher than outside.
Generic synonyms: Enclosure
Definition of Plenum
1. n. That state in which every part of space is supposed to be full of matter; -- opposed to vacuum.
2. n. 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.
Definition of Plenum
1. space considered as fully occupied by matter [n -NUMS or -NA]