Plenum Synonyms & Definitions

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• PlenumDefinition & Meaning in English

1. (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.
2. (n.) That state in which every part of space is supposed to be full of matter; -- opposed to vacuum.